iT IS A DIFFERNT BEAST. The 900 seems louder and fuller at first
but I noticed some of the sounds on the 1000 did not sound as full like vibes, marimba trumpets and a few others. I replaced those with the same legacy sound and the sounds cam back to life. I don't know why but it seems some of the older sounds we hotter {louder and fuller}. everything else seems better. I think when I copied my 900 performances to the 1000 it selected a gm sound because the 900 sound was not in the same place as the 1000. Almost everything else copied perfectly.
It also has a much better H.C. Helicon harmonizer, speakers and many other little things. It just sounds better but like everything else, it takes a little work. The result is a great lightweight keyboard that needs nothing but a little effort to
become great.
MEL