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.

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