If you want long battery life and cushioned on-ear listening, choose Sony WH-CH520; if you need open-ear awareness for running, choose Sudio B2. For the specific sudio vs sony earbuds decision, the main trade-off is straightforward: Sony is built for extended listening, while Sudio keeps your ears uncovered as you move.
For running, I’d lean toward the Sudio B2’s open-ear bone-conduction design and IPX5 water resistance, while keeping in mind its shorter stated playtime. The WH-CH520 makes more sense for everyday listening between workouts, calls, and longer trips.
If you want long battery life and cushioned on-ear listening, choose Sony WH-CH520; if you need open-ear awareness for running, choose Sudio B2. For the specific sudio vs sony earbuds decision, the main trade-off is straightforward: Sony is built for extended listening, while Sudio keeps your ears uncovered as you move.
For running, I’d lean toward the Sudio B2’s open-ear bone-conduction design and IPX5 water resistance, while keeping in mind its shorter stated playtime. The WH-CH520 makes more sense for everyday listening between workouts, calls, and longer trips.
• Sony WH-CH520 strength: Up to 50 hours of battery life, with quick charging. Trade-off: Its on-ear design covers the ears rather than leaving them open.
• Sudio B2 strength: Open-ear bone-conduction design, intended to let you stay aware of your surroundings. Trade-off: Battery life is up to 7.5 hours at 50% volume.
• Sony WH-CH520 strength: Lightweight, cushioned ear pads and an adjustable headband. Trade-off: It has no noise-control feature.
• Sudio B2 strength: IPX5 water resistance and a 29-gram design for active use. Trade-off: Its open-ear sound approach is a different listening experience from cushioned on-ear headphones.
• Pick the Sony for long listening sessions, calls, and switching between two devices; pick the Sudio for movement, open-ear listening, and runs where environmental awareness matters.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
The Sony WH-CH520 is the more conventional choice here: wireless on-ear headphones with soft ear pads, a head cushion, and an adjustable headband. Its standout practical advantage is battery life—up to 50 hours—plus quick charging that Sony says can provide up to 90 minutes of playback from a three-minute charge. That makes it a strong fit for someone who listens through a full workday, commutes, and still wants power left for a trip.
It also suits people who move between a phone and a laptop. Multipoint connection lets the headphones pair with two Bluetooth devices at once, while the built-in microphone supports hands-free calls. You can adjust the sound using EQ Custom in Sony’s Headphones Connect app, and DSEE is included to enhance compressed music files. These features make the WH-CH520 the more flexible everyday listening pick.
For running, though, the design asks you to accept on-ear cups rather than an open-ear fit. The product information lists no noise-control feature, and it does not offer the Sudio’s IPX5 water-resistance rating. I’d skip it if your main priority is keeping your ears uncovered while exercising or choosing headphones specifically described as water-resistant. It is better suited to stationary listening, calls, and general daily use.
The Sudio B2 is designed around open-ear bone conduction. Rather than covering the ears with cushioned cups, it is intended to deliver sound through the temples while leaving the ears free. That makes it the more natural match for someone who wants to listen while staying more aware of nearby sounds. For a run, walk, or gym session, that design is its defining advantage over the Sony.
Its 29-gram weight, flexible band, and IPX5 water-resistance rating also suit active routines. Sudio lists up to 7.5 hours of playtime at 50% volume and a USB-C charging time of 1.5 hours. Bluetooth 5.3, omnidirectional microphones, and button controls round out the practical feature set. The stated frequency range is 20 Hz to 20 kHz, and the headphones include spatial sound by Dirac Virtuo.
Side-by-Side: Which Should You Choose?
• Best for running while keeping your ears uncovered → Sudio B2. Its open-ear bone-conduction design is specifically suited to listening while remaining aware of your surroundings.
• Best for longer battery life → Sony WH-CH520. It is rated for up to 50 hours, compared with up to 7.5 hours for the Sudio at 50% volume.
• Best for a water-resistance specification → Sudio B2. It carries an IPX5 rating; no water-resistance rating is listed for the Sony.
• Best for calls and switching devices → Sony WH-CH520. It has a built-in microphone and can connect to two Bluetooth devices at the same time.
• Best for adjustable sound preferences → Sony WH-CH520. Its EQ Custom app feature lets you tailor sound with presets or saved settings.
• Best for a lightweight active-use design → Sudio B2. Its listed weight is 29 grams, and its band is made to sit around the head during movement.
• Best for cushioned on-ear listening → Sony WH-CH520. It has soft ear pads and a head cushion, unlike the Sudio’s open-ear construction.
• Best for a quick top-up → Sony WH-CH520. Its stated three-minute quick charge provides up to 90 minutes of playback; Sudio lists a 1.5-hour charging time.
In my opinion, I’d choose the Sudio B2 for running because its open-ear design, 29-gram weight, and IPX5 rating align better with an active routine. Its shorter battery life is the compromise I’d weigh before choosing it.
For everything beyond the run—especially long listening sessions, calls, and switching between devices—I’d choose the Sony WH-CH520. If I wanted one pair mainly for running, though, the Sudio is my pick.
The Sudio B2 is the more running-oriented option based on its open-ear bone-conduction design, 29-gram weight, and IPX5 water resistance. The Sony has much longer stated battery life but uses an on-ear design.
The Sony WH-CH520 is listed for up to 50 hours of battery life. The Sudio B2 is listed for up to 7.5 hours at 50% volume, so Sony is the clearer fit for extended listening between charges.
Neither product’s listed noise-control feature indicates noise cancellation. The Sudio’s open-ear design is intended to keep the ears uncovered, while the Sony’s on-ear cushions rest over the ears.
The Sony WH-CH520 has a built-in microphone and multipoint connection for two Bluetooth devices, as well as up to 50 hours of battery life. The Sudio also has microphones, but its open-ear fit and shorter stated playtime make it more specifically suited to active listening.
• Yworlln NE76 vs New Bee 2: Wireless Travel Headphones
• best kids headphones for tv watching
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.