The 970 blows the 950 away. Even the same old styles sound way better on it. Vocal Harmony still suffers in comparison to the other brands. Some of the drum kits are finally better, if you are comparing to 950.
In my opinion it is quite a bit improved over the 950. The screen is a biggy! Still, they could have done so much more . . . Like Johnny Cash, you get One Piece at a Time!