The competition between CFM and Pratt & Whitney is best seen on the Airbus A320 family, where there is a choice. The 737 is all CFM.
Let’s look at the A320 first. CFM has a clear lead over Pratt & Whitney. We have placed the IAE V2500 under the P&W banner as they now own that program. It was formally a partnership with Rolls-Royce.