Short answer: a tie on sound quality. Both are rated 3.9/5 (#516 and #502 of 1291 in-ear headphones) at nearly the same price ($38 vs $34.99), so choose on features and fit.
Why pick the Sony WI-C100: The median of 3 hobbyist measurements gives it a solid Harman preference score of 72 with a 1.94 dB spread. The tradeoff: Presence sits about 3.4 dB low with an 8.1 dB dip near 10.3 kHz, so vocals and instruments lose some bite.
The case for the ZiiGaat Rumba: The median of 7 hobbyist measurements gives it a solid Harman preference score of 72 with a 1.85 dB spread, and its mids sit within about 0.6 dB of target, so vocals and instruments sound natural. The catch: Its 1.85 dB spread is less even than the best measured sets.
Buy the Sony WI-C100 or the ZiiGaat Rumba on features: they are rated the same for sound quality at close to the same price.
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The median of 3 hobbyist measurements gives it a solid Harman preference score of 72 with a 1.94 dB spread.
Amazon $38.00 Lowest Sony $39.99 eBay
The median of 7 hobbyist measurements gives it a solid Harman preference score of 72 with a 1.85 dB spread, and its mids sit within about 0.6 dB of target, so vocals and instruments sound natural.
Amazon $34.99 eBayPrices on this page were last checked October 16, 2026 at 5:46 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Sony WI-C100 | ZiiGaat Rumba | |
|---|---|---|
| Price | $38.00 | $34.99 |
| Ranked | #516 of 1291 in In-Ear Headphones | #502 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 72 (median of 3 squig.link measurements, calibrated to AutoEQ) | 72 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.94 dB standard deviation | 1.85 dB standard deviation |
| Tonal Tilt | -0.49 (negative is warmer, positive brighter) | -0.74 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.2 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.3 dB at 30 Hz) |
| Connection | Wireless | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 9mm dynamic | 1 x 10mm dynamic |
| Weight | 0 lbs (20 g) | - |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 10Hz - 22kHz (Manufacturer specified) |
| Active Noise Cancelling | No | - |
| Battery Life | 25 hours (Manufacturer specified) | - |
| Bluetooth Version | 5.0 | - |
| Bluetooth Codecs | SBC, AAC | - |
| Built-in Microphone | Yes | - |
| IP Rating | IPX4 | - |
| Impedance | - | 32 ohms |
| Sensitivity | - | 109 dB/mW |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the Sony WI-C100 from aquaphobic, kazi and soundignity; the ZiiGaat Rumba from aftersound, atechreviews, audioamigo, bassaudio, bedrock, dl, ducbloke, fernandagunsan, hbb, jaytiss, kuping-sensi, practiphile, silicagel and takeitslow7, all via squig.link.
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