Canon - EOS R1 vs OM System - OM-1 Mark II

The EOS R1 edges ahead on the Mars Score (46 vs 42.8), but the 3.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the EOS R1 if you care most about megapixels / sensor size. The biggest gaps in its favor are megapixels, sensor size, max video.

Pick the OM-1 Mark II if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight.

Both ship with comparable in-body stabilization, af points, log profile, 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.