Short answer: a tie on sound quality. Both are rated 3.8/5 (#625 and #616 of 1291 in-ear headphones) at nearly the same price ($15 vs $15.99), so choose on features and fit.
What the KZ Linlong does well: A broadly balanced tuning with a preference score of 71 against the Harman target. Watch for: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
What the ND Nice does well: A broadly balanced tuning with a preference score of 71 against the Harman target. The tradeoff: An uneven response, 2.4 dB standard deviation from target.
Buy the KZ Linlong or the ND Nice 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 71 against the Harman target.
KZ Audio $15.00 eBay
A broadly balanced tuning with a preference score of 71 against the Harman target.
Amazon $15.99 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
| KZ Linlong | ND Nice | |
|---|---|---|
| Price | $15.00 | $15.99 |
| Ranked | #625 of 1291 in In-Ear Headphones | #616 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 71 (median of 3 squig.link measurements, calibrated to AutoEQ) | 71 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.96 dB standard deviation | 2.38 dB standard deviation |
| Tonal Tilt | -0.87 (negative is warmer, positive brighter) | -0.08 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+3.2 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.6 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 6mm micro dynamic driver (XUN-6) | 1 x 10mm dynamic |
| Impedance | 25 ohms | - |
| Sensitivity | 103 dB | - |
| Frequency Response | 20Hz - 40kHz | - |
| Weight | 0 lbs (18 g) | - |
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 KZ Linlong from aftersound, ianfann and tonedeafmonk; the ND Nice from aftersound, cammyfi, obodio and suporsalad, all via squig.link.
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