Between the ER4XR and Variations, the ER4XR comes out ahead in several specs, while the Variations wins on impedance and sensitivity. Overall, the ER4XR scores 39.7 and the Variations scores 69.2 on our Mars Score.
Which should you buy?
The Variations is the clear pick on raw spec strength, leading by 29.5 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
The ER4XR doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the Variations if you care most about impedance and sensitivity. Its strongest claims are impedance, sensitivity, driver count.
Both ship with comparable detachable cable, so those specs don't separate the two — focus on the differences below.
Bottom line: the Variations is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Etymotic - ER4XR wins
- No decisive advantages.
Why Moondrop - Variations wins
- ▲Impedance — 29.80 Ω less. 15.2 vs 45.
- ▲Sensitivity — 20.41% more. 118 dB vs 98 dB.
- ▲Driver count — 4.00 more. 5 vs 1.
Spec comparison
Drivers
| Spec | Etymotic - ER4XR | Moondrop - Variations |
|---|---|---|
| Driver count | 1 | 5lead |
| Driver types | Balanced Armature | 1DD + 2BA + 2EST Tribrid |
| Impedanceⓘ | 45 Ω | 15.2 Ωlead |
| Sensitivityⓘ | 98 dB | 118 dBlead |
Build
| Spec | Etymotic - ER4XR | Moondrop - Variations |
|---|---|---|
| Detachable cable | true | true |
| Connector | MMCX | 2-pinlead |
Frequently asked
Spec-level deep dives
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