Blueair - Blue Pure 311i+ Max vs Winix - 5500-2

The Blue Pure 311i+ Max edges ahead on the Mars Score (61.3 vs 56.9), but the 4.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the Blue Pure 311i+ Max if you care most about cadr and coverage. The biggest gaps in its favor are cadr, coverage, min noise, among others.

The 5500-2 similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.

Both ship with comparable activated carbon, 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.