Be aware that neither displays text files, only midi lyrics. It was another deal breaker for me.
Thoase screens are too small for lyrics for us old guys and you'd have to be looking up and down constantly while playing. Ipad mounted above the keyboard is the way to go. I think Roland left the touch screen and lyrics function out to keep cost down and they seem to be moving in a direction of incorporating the ipad more with their instruments. Makes a lot of sense.