Canon - EOS R5 Mark II vs OM System - OM-1 Mark II

The EOS R5 Mark II is the clear pick on raw spec strength, leading by 18.3 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the EOS R5 Mark II if you care most about megapixels and 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 don't separate the two — focus on the differences below.

Bottom line: the EOS R5 Mark II is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.