Sony - FE 50mm f/1.4 GM vs Voigtländer - APO-Lanthar 50mm f/2 SE

These two are nearly even on the Mars Score (69.5 vs 70.9). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the FE 50mm f/1.4 GM if you care most about weather sealed. The biggest gaps in its favor are weather sealed. The single most decisive one: Has Weather sealed.

Pick the APO-Lanthar 50mm f/2 SE if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight. The single most decisive one: Weight — 152.00 g less. 364 vs 516.

Both ship with comparable min focal, max focal, optical stabilization, 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.