Short answer: a tie on sound quality. Both are rated 3.9/5 (#499 and #541 of 1291 in-ear headphones) at nearly the same price ($94.99 vs $99), so choose on features and fit.
What the Juzear x Z Reviews Defiant does well: A broadly balanced tuning with a preference score of 73 against the Harman target. The catch: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Why pick the qdc SUPERIOR: A broadly balanced tuning with a preference score of 72 against the Harman target. The catch: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the Juzear x Z Reviews Defiant or the qdc SUPERIOR on features: they are rated the same for sound quality at close to the same price.
Still deciding? The full Headphones rankings cover every ranked option.
A broadly balanced tuning with a preference score of 73 against the Harman target.
Amazon $94.99 eBay
A broadly balanced tuning with a preference score of 72 against the Harman target.
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Specifications Side By Side
| Juzear x Z Reviews Defiant | qdc SUPERIOR | |
|---|---|---|
| Price | $94.99 | $99 |
| Ranked | #499 of 1291 in In-Ear Headphones | #541 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 73 (median of 12 squig.link measurements, calibrated to AutoEQ) | 72 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.91 dB standard deviation | 2.18 dB standard deviation |
| Tonal Tilt | -0.71 (negative is warmer, positive brighter) | -0.07 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.9 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.2 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 3 balanced armature) | Dynamic |
| Drivers | 1 x dynamic + 3 x balanced armature | 1 x 10mm dynamic |
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 Juzear x Z Reviews Defiant from atechreviews, audioamigo, bryaudioreviews, elrics, gadgetrytech, jaytiss, koi, samreviews, sl0the, soundignity, superreview and zerostresslevel; the qdc SUPERIOR from awsmdanny, dchpgall and ekaudio, all via squig.link.
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