Ian, the thing about the Rolands is that there is only one intro and one ending button. You have to quickly press intro and variation one together to get intro one, unless you are already playng in variation one, which I seldom am when i need a Break/fill.
This was not a problem on BK7m because each could be addressed individually via midi. I could get a Behringer midi foot controller, but that's just more gear to buy and carry.
It's not a deal breaker, but an annoyance.