Mostly prefrence.
MY OPINION:
The M11's wheel is way to thin so you have to almost fingertip it, I know people who likes it this way though.
The 3PKS has a nice joystick feature, super easy navigation through the menus.
Both vibrate for refueling.
It's close, personally, whichever you get should be fine, I also reccomend a Spektrum module for it also.
I run the 3PK with the Spektrum DSM Pro Series HRS which cuts the latency to 2.0 PLUS since the tx is running in HRS mode, it's own latency is cut. This is what I was told by Horizon(Spektrum)