Chas, the G7 is a workstation (very good one), with sequencer, audio and midi recording and sampling,.
The Jupiter 80 is a performance instrument (also very good) with NO sequencing or sampling. The sound engine is based on the Integra7.. with the Integra7 having the edge in complete sound library (includes all of the SRX expansion sounds..).
But that's exactly what the Jupiter 80 does NOT have: the complete SRX library. None of it. That's why it wouldn't be so appealing to me.
Its a typical Roland product, all great Roland products have abandoned the past, and stepped on new roads... in the past, it often made me kind of sad... like the new `fantom abandoning hte super natural sounds as well as the ACB technollogie
Just read my post above, where i try to explain what sets the Jupiter 80 apart from the rest..