Did RZR1000s get upgraded/different clutch than the 900s

Been lurking around the forum for awhile. In the market for the a new S model RZR. Bee looking at the 900S forum to look at all possible issues that I might encounter as the 1000s forum still seems pretty new. From what Ive been reading is the 900s has a bunch of secondary clutch "chatter" I don’t think I’ve read any post that this "hurts" it but is annoying. On polaris website, the 1000s page boasts new and improved clutch..have we confirmed if this is correct or is the 900s included on this improved clutch? I searched but could not find anything other than speculations.. Talked to local dealer he said everything is the same between the 900s and 1000s other than larger cc through stroke or bore but I thought I read the 1000s got upgraded front differential..is that true?