Bang & Olufsen - Beosound A1 (3rd Gen) vs Marshall - Stockwell III

These two are nearly even on the Mars Score (67.3 vs 65.3). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the Beosound A1 (3rd Gen) if you care most about output power / water resistance. The biggest gaps in its favor are output power, water resistance.

Pick the Stockwell III if you care most about battery / low-end response. Its strongest claims are battery, low-end response.

Both ship with comparable stereo pairing, 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.