I've been looking at a wide variety of synths recently and I've noticed most synths (that I've seen) come with a pitch-bend wheel but the MIDI controller I really want (Roland AX-7) uses a pitch-bend ribbon. Is there a significant difference between these two things? I've seen them both in action so I know the differences but I'm more referring to how easy it would be to learn to use one, assuming a person knows how to use the other.