I had a PM45 and a P45 (similar to the CW45) as well as a PM9.
I shot the two 45s both "pretty close" to equally, and would say the difference between the two was minimal. The P45 holds an extra round--the five plus one of the PM45 strikes me as somewhat marginal.
I sold the PM to a friend who loves it and carries it regularly. I carried the PM9 for three years and the P45 for a year and a half. Still have both of them, and will keep and probably carry both again.