Gigabyte - X870 AORUS Master vs MSI - MAG B850 Tomahawk

The X870 AORUS Master edges ahead on the Mars Score (69.1 vs 65), but the 4.1-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the X870 AORUS Master if you care most about max memory. The biggest gaps in its favor are max memory.

The MAG B850 Tomahawk similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.

Both ship with comparable m.2 slots, ram slots, pcie slots, 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.