Sigma - 85mm f/1.4 DG DN Art vs Sony - FE 135mm f/1.8 GM

The FE 135mm f/1.8 GM edges ahead on the Mars Score (65.7 vs 72.4), but the 6.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the 85mm f/1.4 DG DN Art if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight.

Pick the FE 135mm f/1.8 GM if you care most about min focal and max focal. Its strongest claims are min focal, max focal.

Both ship with comparable weather sealed, optical stabilization, so those specs don't separate the two — focus on the differences below.

Bottom line: the FE 135mm f/1.8 GM is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.