When I first saw the rack I figured it was missing the pad which was one of its main features on the keys. But as said above, the time trip can be done on the touch screen. I wonder how it does compare to the original. Has anyone tried them both that is familiar? They actually have this long demo on Rolands site showing tons of patches being briefly performed, the guy has the rack and the keyboard, yet he does time trip for all the patches right on the rack. Seems to work well, but I don't know from experience.
Doesn't have the d-beam, but that is kind of ghey sometimes. Everytime I see someone on their groovebox use it, I can't help but chuckle. Keys are nice if you dont already have a ton of keyboards taking up tons of space (I have enough). I don't think its quite twice the price of the rack unless you are considering a used keys vs new rack. I perfer buying things used for cheaper, but the rack will be there eventually. Its not only the color screen that the rack has, but also assignable knobs and the 2 V-cards built in. You can get those on the keys, but it would cost quite a bit more making the price gap smaller. Have to figure in thats part of the reason the rack costs more.