@SSJR2 The only difference between Haru and Lucia's swords were the aesthetic of the plain form and what emotion the tenth form was powered by. If that much difference is enough for you, then I have exciting news: Justice's ether gear changes his hair color and Elsie's doesn't. They're different...
@SSJR2
I take it you never read Rave Master, Mashima's first series. He gave the hero a sword that could change between ten forms that each had their own magical power, then gave an evil version of that sword to the first major villain. After that guy's defeat, the evil sword fell into the...