Maybe LDH will chime in, but I'll bet that 900RR's lines look a lot better after a can and a rejetting.
My 929 has at least as much mid as the 919. I ran roll-ons with the 2. But at about 9000 rpms, the 919 party was over, the 929's afterburners kicked in.
Try a 599. 13,000 redline. I may be wrong, but in the real world, I think it's just as fast as a 919. You just have rev it more.