Thinner grips is not going to help a double-stacked 44.
going single stack you give up a lot of capacity.
The main issue especially with a compact 1911, is many aren't going to be that accurate with them and most will not like to shoot them a lot.
I was pro-1911 for a long time and I still believe if one is going to carry a full-sized handgun then the 1911 should be at the top of their list.
However, IMHO the CZ P01 is an EXTREMELY good choice for a gun you'd depend with your life.
This will be the gun I will be going with. I may still pick up a nice 1911.
Again my criteria is a reliable gun with decent capacity that can be conceal carried when needed without a lot of drama. Also being able to fire 'bursts' accurately.
If I have to fire on someone, I plan on no less than putting 3 rounds at a time into them. With a 7 round compact, that leaves me about one miss. With 15 rounds, I have a lot more room for error.
Firing at the range is a lot different than firing while you and/or them may be moving, in the dark and in the stress of a true dangerous situation.
even with overall proportions the same, that double-stacked 44 is a lot thicker than any double stacked 9mm.