Sony - FE 70-200mm f/2.8 GM OSS II vs Tamron - 28-75mm f/2.8 Di III VXD G2

The FE 70-200mm f/2.8 GM OSS II is the clear pick on raw spec strength, leading by 14.2 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 FE 70-200mm f/2.8 GM OSS II if you care most about optical stabilization / min focal. The biggest gaps in its favor are optical stabilization, min focal, max focal.

Pick the 28-75mm f/2.8 Di III VXD G2 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 weather sealed, so those specs do not separate the two — focus on the differences below.

Bottom line: the FE 70-200mm f/2.8 GM OSS II is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.