For one Giovanni's clothes looks like they actually belong in the renaissance, (in fact they aren't really even Assassin robes so to speak, just a vest) can't quite say the same for the Brotherhood robes seeing as they're intended to be a mashup of Altair and Giovanni's styles. My personal pet peeve is that the Brotherhood robes to me also present a paradox, they're just sheets and yet at the same time too flamboyant, I don't know how it's possible, it's kind of incredible really. Incidentally, I absolutely love how Ubisoft just gave up by Ac3 and had Connor wear a plain coat, kinda gotta give them props for that.