Canon - RF 50mm f/1.2L USM vs Voigtländer - Nokton 40mm f/1.2 SE

The RF 50mm f/1.2L USM edges ahead on the Mars Score (57.6 vs 54), but the 3.6-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the RF 50mm f/1.2L USM if you care most about weather sealed and min focal. The biggest gaps in its favor are weather sealed, min focal, max focal.

Pick the Nokton 40mm f/1.2 SE 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 optical stabilization, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.