Sony - FE 135mm f/1.8 GM vs Sony - FE 70-200mm f/2.8 GM OSS II

These two are nearly even on the Mars Score (72.4 vs 71.3). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the FE 135mm f/1.8 GM if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight, min focal.

Pick the FE 70-200mm f/2.8 GM OSS II if you care most about optical stabilization / max focal. Its strongest claims are optical stabilization, max focal.

Both ship with comparable weather sealed, 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.