I think I asked this before, but I forgot the answer. I don't know if anyone has them both - loose and w. batteries in them.
However, my Vader saber makes less various clash noises than my Anakin ROTS or Luke ROTJ sabers. I was wondering what's up with that?
I have the Vader ESB saber I believe.
I wouldn't think anyone needs them both, but you never know. Someone might - especially if they sound different.