Do you know what happened to that vocalist? I loved him as well. Was that aria singing? idk. the demos reminded me so much of of machines.
Both OM and I,A were produced by Cameron Mizell (Chango) which may attribute to some of the similarity. To be honest, I thought the difference in the cleans in I,A and FAIM were due to producer change as well as the singer geting older (I think they're all pretty young). I think all the cleans have always been done by one of the guitarists/bassist but I don't know for sure.