Sennheiser - HD 660S2 vs Sennheiser - Momentum 5 Wireless

The Momentum 5 Wireless is the clear pick on raw spec strength, leading by 9.7 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.

Pick the HD 660S2 if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight.

Pick the Momentum 5 Wireless if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. Its strongest claims are active noise cancellation, multipoint, ldac, among others.

Both ship with comparable driver size, spatial audio, water resistance, so those specs don't separate the two — focus on the differences below.

Bottom line: the Momentum 5 Wireless is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.