So I know that armors like steel and leather have changed over the in game years and it makes sense but I was wondering about the other types mainly Elven and Dwemer. Now do the Dwemer armor and weapons differ because of region or just that the devs wanted to make it look cooler each ES game that came out. Now with Skyrim and Snow Elves is the Elven weapons and armor we find supposed to be Snow Elf and and whatever other Mer race armor and weapons mashed together out of laziness or are there no Snow Elf weapons to be found as we do get Snow Elf armor in game and if so why do Elven weapons and armor change style when found deep in ruins is it just another lazy way of not including other skins or is there a reason. And why no Snow Elf weapons?

Elven armot being just a category defined by the material used should be designed differently from armorer to armorer.
Dwemer armor is made of Centurion parts, at least that`s what I recall, so those designs varying is just Bethesda using different art styles.