Nothing - Ear (3) vs Anker - Liberty 4 Pro

These two are nearly even on the Mars Score (70.8 vs 72.8). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the Ear (3) if you care most about driver size / weight per bud. The biggest gaps in its favor are driver size, weight per bud, water resistance.

Pick the Liberty 4 Pro if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are battery — buds.

Both ship with comparable battery — with case, active noise cancellation, spatial audio, so those specs do not separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.