Can't speak for the CVP 701, I did see and hear live Peter Bartmaans play the CVP 709 and it's a fantastic instrument. I have a CVP 307 at home, I once owned a DGX650 and there's no comparison the CVP307 is many miles ahead of the DGX650 including a graded hammer action, that's in the CVP307
And i think the 701 is about a decade more advanced then the 307, tough they might actually have the same GH3 keybed...