JBL - Live Beam 3 vs Master & Dynamic - MW09

The MW09 edges ahead on the Mars Score (76.1 vs 79.3), but the 3.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the Live Beam 3 if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. The biggest gaps in its favor are spatial audio, weight per bud.

Pick the MW09 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, driver size, water resistance.

Both ship with comparable battery — with case, active noise cancellation, 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.