P01 works better for me.*
* I actually carry a P07 most days, but it's close in size to the P01.
I don't carry my Rami as I find the mag release a little harder to get to, and the mags catch on the heel of strong hand forcing me to pull them with my left.
I'm average height, thicker (not fatter;)) than average build.
I have no trouble AIWB carrying a weapon the size of a P01 under a heavy T-shirt. I'm in and out of vehicles all day long, and with a good belt and holster, I can ride, walk, run, and do pretty much any task comfortably.
They're both great choices dependant on your physical makeup. What I finally figured out is:
I can daily carry a bigger gun than I thought I could.
All things being equal, given the option, I'd prefer to carry a larger gun when I can.