In addition to the small, incremental improvements over the S970 (which I have), I wish someone could address whether the S975 has made any improvements to the basic voices? For example, are the pianos, basses, guitars, drums, etc. the exact same voices as those on the S970? Or, maybe, just maybe----Yamaha was made some tweaks to the EQ, the effects, or whatever, that will improve the overall sound of the S975. Sort of like Genos owners saying that it sounds cleaner and more open than the Tyros 5.