Am I the only one that see no significant similarities between the two except the fact that they're both portraying the same thing? I mean like reasonably speaking, there can only be so much difference between two sets of skins of what is essentially the same outfit. As for poly-counts, it's not unreasonable for poly-counts to be similar. The remake assets were rescaled according to Kitase, and the format of the skin file being similar is stated as the reason the porting being possible and easy to do in the first place.
Among other things pants are completely different (look to the diagonal stripes, and pocket on the upper picture), as is the mesh upper part and the gloves.
It's not just a matter of bump-mapping and lighting.
Again, it's an iconic outfit - the motif is the same, so variational possibilities are limited given that when making texture for such an outfit, you're trying to recreate a thing that already has an established appearance.
I'm serious though, I really don't see much similarities between those two textures apart from what can easily be explained by the fact that the motif is the same.
It's an established outfit.
It's perfectly possible that the new textures were made working off of earlier textures though, and that could be true even for the remake model's textures, I'm perfectly happy to grant that.