I own a M11 and love it...

I have used a 3PK, Helios, React, Sensor and a few others, and none of them for me feel as balanced or as comfortable in the hand as the M11...

Both radios are just as user rich as each other (with the M11 being slightly faster in response time)

It is mainly just user preference, to what feels most comfortable for you..

NOTE: people with big hands usually like the 3PK or Helios compared to the M11, where as people with small hands prefer the M11....