Nothing - Ear (a) 2 vs Anker - Liberty 5

These two are nearly even on the Mars Score (74.5 vs 76.1). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.

Pick the Ear (a) 2 if you care most about driver size. The biggest gaps in its favor are driver size.

Pick the Liberty 5 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, battery — with case, water resistance, among others.

Both ship with comparable active noise cancellation, spatial audio, multipoint, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.