Off the top of my head I do not know the difference, but you can view the parts lists for both units at the AGCO websites for free. (Do not give up if you do not find them easily, sometimes it takes creative searches to get the parts list but it is there).
I do think that somewhere in there that Hesston switched their steel roller design (and of course the mating rubber roller too) from what I call the flat teeth design (similar to older PT units)to the more Vee shaped pattern used on newer units like the 1120.
FWIW: I have a highly abused 1120 (prior owners) and love it.
This post was edited by rankrank1 at 11:46:06 08/10/13.
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