I did notice that the Republic armor does look considerably like Clone armor, which was based around Mandalorian Armor, but that's probably just to keep with the SW aesthetic . As for the main distinction of Mando armor being beskar, that's false. Most of the famous Mandos (both Fetts, for example) didn't have beskar armor. Instead, they used durasteel. The part that makes it most easily recognizable is the segmented armor (neo-crusaders aside) and the T-visor. Also, let's face it, any in-game full-on beskar would be OP.