Yes the 3 new features I value most are very similar:
1. The SD card (1 x 128M card effectively replaces 100 floppies).
2. The new organ sounds (and general sound quality).
3. 128 note polyphony. (I occasionally ran out of notes with 64).
There are lots of other differences but for me these are the really significant improvements on the 6000/6500.

Len C.