Do a search on this subject. I posted a very similar question a few months back. I believe my title was " what is the difference in the 63 turbos?" If you're just wondering h.p.-wise I believe they go in this order, from weakect to strongest...
TE-62: good for @630 hp, flows 935 cfms
TE-63E: good for @680 hp, flows 950 cfms
TE63-1: good for @715 hp, flows 970 cfms.
If you want more specifics do a search at www.gnttype.org. Hope this helps.