Quick answer
Choose by workload—not bestseller position.
Choose WH-CH520 when Bluetooth, calls, multipoint connection and long stated battery life matter. Choose the exact MDR-ZX110 model when a simple wired headphone with no charging requirement fits the job. Neither includes Active Noise Cancellation. This is an official-source comparison, not a hands-on sound, comfort or microphone test.
What the Amazon rank does—and does not—tell us
Amazon's Electronics Best Sellers page placed Sony MDR-ZX110 at number 10 and WH-CH520 at number 22 when checked on August 31, 2026. That rank is a shopping signal, not Google demand or measured sound quality.
Connection is the real choice. The WH-CH520 adds Bluetooth, a microphone, app EQ and multipoint, while the exact non-AP MDR-ZX110 ASIN is a wired listening model without a battery or microphone.
SEO boundary: Amazon sales rank is not Google keyword volume, ranking authority, product quality or an endorsement by SmarterBuyLab. It is used only to discover current buyer interest.
The exact configurations observed
Sony WH-CH520
Wireless Bluetooth on-ear headphones with microphone
- Best for
- Wireless calls and everyday listening across two paired devices
- Watch for
- Sony lists no ANC and no passive wired listening connection
- ASIN
- B0BS1PRC4L
Sony MDR-ZX110
Wired on-ear headphones, black, exact non-headset model
- Best for
- Simple wired listening from devices with a compatible headphone output
- Watch for
- This exact model has no microphone, Bluetooth, battery or ANC
- ASIN
- B00NJ2M33I
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Official-source decision evidence
WH-CH520
Sony lists multipoint connection for two devices.
Sony also states a three-minute charge can provide up to 90 minutes under its conditions.
The wireless model includes call controls and a microphone.
Do not confuse the closed on-ear design with Active Noise Cancellation.
MDR-ZX110
The exact model uses a fixed headphone cable.
Sony lists a closed, dynamic on-ear design.
This is Sony's published specification, not a SmarterBuyLab measurement.
The MDR-ZX110AP is a different headset model; verify the suffix.
Decision rules
- Choose wired when the source has a compatible output and zero charging is valuable.
- Choose wireless when calls and movement matter enough to manage battery and pairing.
- Do not buy either expecting ANC; Sony does not list it for these models.
- Distinguish MDR-ZX110 from MDR-ZX110AP because microphone support differs.
What to verify before checkout
- Confirm the source device has the correct wired audio output if choosing MDR-ZX110.
- Verify the exact model suffix and microphone requirement.
- Check whether multipoint and app support work with the intended devices.
- Review seller, fulfillment, warranty, returns and live checkout total.
Sources and research boundary
This page uses a dated Amazon category observation to select the question and current Sony documentation to answer it. SmarterBuyLab did not purchase, benchmark or otherwise test these products, and it does not infer speed, durability, reliability, sound, display or battery performance from sales rank.
- Amazon Electronics Best Sellers ↗
- Sony WH-CH520 product specifications ↗
- Sony MDR-ZX110 product specifications ↗
- Amazon Sony WH-CH520 listing B0BS1PRC4L ↗
- Amazon Sony MDR-ZX110 listing B00NJ2M33I ↗
Ready to compare current listings?
Carry the configuration checklist to Amazon.
Confirm ASIN, memory, storage, seller, fulfillment, warranty and return terms on the live page. Do not rely on the dated rank alone.
As an Amazon Associate I earn from qualifying purchases.