OM System - OM-1 Mark II vs Sony - α7 IV

The α7 IV is the clear pick on raw spec strength, leading by 10.0 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 OM-1 Mark II if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight, af points.

Pick the α7 IV if you care most about megapixels and sensor size. Its strongest claims are megapixels, sensor size.

Both ship with comparable max video, in-body stabilization, log profile, so those specs don't separate the two — focus on the differences below.

Bottom line: the α7 IV is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.