Tamron - 150-500mm f/5-6.7 Di III VC VXD vs Tamron - 28-75mm f/2.8 Di III VXD G2

The 150-500mm f/5-6.7 Di III VC VXD edges ahead on the Mars Score (73.9 vs 69), but the 4.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the 150-500mm f/5-6.7 Di III VC VXD if you care most about optical stabilization / min focal. The biggest gaps in its favor are optical stabilization, min focal, max focal. The single most decisive one: Has Optical stabilization.

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. The single most decisive one: Weight — 1185.00 g less. 540 vs 1725.

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.