From what the Trials Bike people say "the back of the caliphers do not stick out as far as the Magura." I bang my leg on my Maguras quite often. I have rub the paint clean off the backs of them. Also noted was the hose routing from the master cyclinder, it rides real close to the bar/seatpost so it stay out of the way. Just another option for the mUni.
Not sure I'm ready to replace my current brake, I need to bang my leg a couple more times 😉