It has been a couple of years since the Sony WF-1000XM3 entered the marketplace, and we liked it for its sound quality and intuitive design. With the newly released Sony WF-1000XM4 test results in, we asked: is it worth upgrading, or should you take advantage of the WF-1000XM3 price drop?

Sibling rivalry with the Sony WF-1000XM3 and WF-1000XM4

A photo of the Sony WF-1000XM4's case open, revealing the earphones sitting within.

The addition of the copper mic housings make the Sony WF-1000XM4 a bit more glam.

There is a clear generation gap between the Sony WF-1000XM3 and its younger sibling, the WF-1000XM4, but the resemblance is obvious. On paper, both earphones have a lot in common, but the WF-1000XM4 basically takes all the features of the XM3 and improves upon them, albeit at a premium cost.

Related: What makes a good set of in-ears?

In a gesture of environmental tokenism, Sony ships the WF-1000XM4 in recycled packaging. The Bluetooth 5.2 support and newly added LDAC codec to the roster ought to please those looking for high-bitrate streaming. The buds come in a slick capsule-like charging case providing around 24 hours of charge between the earphones and the case charges.

Sony WF-1000XM3 earbuds on a beige book with the closed charging case closed in the background.

The previous generation, WF-1000XM3 has a more liberal dose of copper in the packaging.

The WF-1000XM3 (can we please get better names, Sony?) arrives in a white glossy box that looks par for the course in the earphones market. You can recycle it. You get the older (but still good) Bluetooth 5.0 connection and only AAC and SBC codecs. The case is bigger, but not large, and it’s easy to scratch.

Noise cancelling and isolation are improved on the Sony WF-1000XM4

A photo showing the memory foam tips of the Sony WF-1000XM4.

The polyurethane foam ear tips of the Sony WF-1000XM4 make for an easy fit every time.

Noise cancellation and isolation are two sides of the same coin. A good, isolating fit that seals to your ear canal is the easiest way to reduce how much external noise you hear. The included foam ear tips with the WF-1000XM4 are great for this—if you compress them and then let them reinflate to fit the shape of your ear, you’ll get a super secure fit. The Sony WF-1000XM3’s large selection of ear tips offers a different flavor of the same principle, in rubber and a less conforming foam. This improved isolation makes a difference before even testing out the active noise cancelling (ANC) between the models, as isolation is better at reducing the volume of high pitched and incidental clangs than ANC.

The Sony WF-1000XM3 extra ear tips on a black table.

You can maximize isolation from mids and highs by ensuring a good seal with one of the many ear tips Sony supplies with the WF-1000XM3.

Noise cancelling technology is best at combating low, droning frequencies, and the WF-1000XM3 was pretty good at that when it released in 2019, but the WF-1000XM4 is better across the board. In lower registers, the WF-1000XM4 comprehensively attenuates approximately between 5 and 25dB of noise. The older iteration meanwhile struggles to attenuate more than 5dB in the bass frequencies.

On the WF-1000XM4 you can cycle through the ANC modes, including ambient sound, by tapping the left earbud. The Speak to Chat feature is particularly useful when someone needs to ask a quick question, automatically turning on audio passthrough when someone starts talking, so you can have a conversation without having to hit pause or remove the earbuds. That said, we all know you’re polite and will remove the earphones for long conversations, right? It’s no contest, and the WF-1000XM4 is the clear winner here.

See: Best noise cancelling true wireless earphones

Android users get the LDAC codec with the WF-1000XM4

A photo showing the Sony WF-1000XM4 in its case, with the lid open.

Pairing the WF-1000XM4 earphones is easy after the first time.

While Apple devices still use the AAC codec for wireless audio, an area where it’s a tie between both Sony earbuds, Android users get to access Sony’s high-bitrate LDAC codec with the WF-1000XM4. The lossy SBC codec is the best option with the WF-1000XM3 for Android due to the unreliable ways different devices handle AAC. In the battle for superior audio quality, this one goes to the new guy in town.

There’s more to the story, however. Both sets of earphones provide Sony’s 360 Reality Audio and some form of digital sound enhancement engine (DSEE). This makes them both better than your average earphones, because 360 Reality Audio creates a greater spatial surround sound experience—mind you, it’s limited to TidalDeezer, and Amazon Music HD.

Learn more: Understanding Bluetooth codecs

DSEE is Sony’s workaround to upscale lossy audio to high resolution. The WF-1000xm3 has DSEE HX and the WF-1000XM4 has the upgraded, DSEE Extreme. The difference is hard to notice for most people, but DSEE is helpful for lossy streaming in either case. It uses an algorithm to contextually predict and add missing frequencies to lossy audio files.

Bluetooth 5.2 and the V1 processor means better battery life with the WF-1000XM4

Sony WF-1000XM3 charging case closed and on a black table with a leather watch in the background.

The Sony WF-1000XM3 case is bulkier and supplies less reserve power than the WF-1000XM4 case.

The Achilles’ heel of any true wireless earphone is its battery life. Batteries have come a long way, but constant recharging is always going to reduce lifespan, which is why besides convenience it’s good to have a long-lasting battery onboard. The WF-1000XM3 worked for 4 hours, 46 minutes in our testing, and the new WF-1000XM4 managed 7 hours, 43 minutes.

Updated technology and refinement of a very good formula is the main difference between the WF-1000XM4 and WF-1000XM3.

Neither battery result is class redefining, but both powering features line ANC and DSEE takes a lot of juice. Part of the improved battery life on the WF-1000XM4 is Sony’s implementation of Bluetooth 5.2, which is kinder to batteries than previous Bluetooth versions, and the Sony V1 processor, which uses less energy for basic functions. Bluetooth 5.2 also has the potential to support LE Audio down the line, perhaps in a firmware update, though Sony has yet to confirm this.

A case for better cases

A photo comparing the relative size of the Sony WF-1000XM3's case with the Sony WF-1000XM4's.

The new Sony WF-1000XM4 has a much smaller case than that of the Sony WF-1000XM3.

Much like the race of flip phones to get smaller in the 2000s, true wireless earphone cases seem to get easier and easier to lose. Unless you have those trousers with fake pockets, both the WF-1000XM3 and XM4 cases will fit in your pocket. The WF-1000XM4 is considerably smaller, and provides at least two extra charges, totaling about 24 hours of power. It charges via USB-C, as does the WF-1000XM3. The WF-1000XM4 can also charge wirelessly with a Qi pad. The case for the WF-1000XM3 provides three additional charges, but remember the XM3 has a significantly shorter battery life overall, yielding around 19 hours total including the buds.

Related: Best true wireless earbuds

The case for the WF-1000XM3 is a bit of scratch-magnet, and while the copper lid is attractive, stash it away in a bag or pocket and it’ll accrue scars. Sony switched to the decidedly more stealthy, single-color matte plastic case for the WF-1000XM4. It’s pretty resistant to fingerprints and scratches—a thoughtful improvement.

Does the Sony WF-1000XM4 or Sony WF-1000XM3 sound better?

A chart showing the frequency response of the Sony WF-1000XM4 true wireless earphones compared to the SoundGuys house curve.

The pink line is our platonic ideal frequency response, and the blue line is Sony WF-1000XM4’s frequency response.

At a glance, the frequency responses of the Sony WF-1000XM3 and XM4 are somewhat similar, with a bass boost and a highest decibel peak around 2kHz to 3kHz. The Sony WF-1000XM4 more drastically tapers down in volume in the upper registers than the XM3. This de-emphasized treble response can make it difficult for you to hear higher-pitched harmonics.

The Sony WF-1000XM3, however, has a different problem in that the amplified bass notes can mask the more de-emphasized midrange. Again, making it hard to hear vocals and popular string instruments like the acoustic guitar. Though imperfect, these are generally consumer-friendly frequency responses, but they’re also not set in stone.

A frequency response chart for the Sony WF-1000XM3 noise cancelling true wireless earbuds, which shows output that deviates from our house curve, particularly with midrange and treble reproduction.

You’re going to want to tinker a bit with the Headphones Connect app a bit to find your best sound.

Using the Sony Headphones Connect you can adjust your EQ to suit your tastes. On the WF-1000XM4 you can even use our house frequency response curve as a guide: turn down the lower mids and bass a touch so they don’t mask treble notes. If you’re spending the money, you might as well use the app’s feature to improve on the template.

Both earbuds are compatible with the Headphones Connect app, available on iOS and Android, and you’ll need to download it to get the best sound out of either.

The WF-1000XM4 has the better design

A photo showing someone using the touch controls of the Sony WF-1000XM4.

The WF-1000XM4 capacitive touch controls are straightforward but somewhat customizable.

The WF-1000XM4 is smaller and fits better. The WF-1000XM3 is no slouch, and the touch controls competently work, but the aesthetic design is comparably dated. The older earbuds are also significantly larger, with a sort of exaggerated pill shape. This design is typical of other noise cancelling true wireless earphones, like the Bose QuietComfort Earbuds.

Most of the controls are on the right earbud of the WF-1000XM4, with the left dedicated to ANC modes. Both models work very well, but the newer WF-1000XM4 is less clunky, without costing any functionality.

Take the WF-1000XM4 to the gym

The Sony WF-1000XM4 on a wet, red bench, also with moisture on the earphones.

An IPX4 rating means splashes, sweat, and humidity won’t kill your earphones.

This one is simple: if you plan on sweating or live somewhere humid, the WF-1000XM4 is your best bet. Because the WF-1000XM3 has no IP rating, we can’t recommend it for activity involving moisture. The IPX4 rating on the WF-1000XM4 is an improvement on no rating, but it’s still just sweat-resistant—you can’t submerge any of these earbuds in water. With that said, it’s nice to know you’re not going to destroy your premium earbuds just because it’s a hot day or you had an intense workout. Just make sure you’ve sorted out your fit prior to going for a run, because they’re little enough to lose if they fall out.

Which pair of earbuds is best for phone calls?

Close-up image of a Sony WF-1000XM3 earbud with the touch panel clearly visible.

The WF-1000XM3 is available in black or white, with gold accents.

This one seems like a bit of a draw. Sony added a feature to detect and boost the frequencies your voice is in when you’re speaking into the mic on the WF-1000XM4. Both models have useable microphones, but it’s a weak spot in both generations, especially compared to a company like Jabra, for instance. What do you think?

Sony WF-1000XM4 microphone demo

Sony WF-1000XM3 microphone demo

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Sony WF-1000XM4 vs. Sony WF-1000XM3: Which is the best?

A photo showing the Sony WF-1000XM4 in the charging case.

A durable fit and finish is appreciated, because most people aren’t trying to develop patina on their true wireless earbuds.

In virtually every category the Sony WF-1000XM4 beats out the WF-1000XM3, except price. If you don’t need excellent ANC and you’re using an Apple iPhone (so you don’t have a use for the LDAC codec), save a few dollars and buy the WF-1000XM3. In fact, if you’re okay with refurbished products, you can grab the WF-1000XM3 refurbished for around $100.

Sony WF-1000XM3
All prices listed in USD unless otherwise specified. Prices may change over time, and vary by region. Unfortunately, we cannot list Amazon prices on the site, as they vary greatly by currency.

On the other hand, here you are reading about premium true wireless earphones, and the Sony WF-1000XM4 is superb. You get some very good ANC, improved battery life, a more durable case, and an overall better product that renders high-bitrate audio. Price aside, without hesitation, the Sony WF-1000XM4 is the best.

Sony WF-1000XM4
All prices listed in USD unless otherwise specified. Prices may change over time, and vary by region. Unfortunately, we cannot list Amazon prices on the site, as they vary greatly by currency.

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