They both hold 8rd of 9mm in a single stack mag. The dimensions of each can be easily looked up, but that doesn't tell the full story. I was wondering could somebody who has both post a picture of a size comparison between them both? Also, the P225 is bigger, but what are the advantages of the gun over the newer design of the P239? I see .3" extra barrel, that's about it. Pro and con comments about rifling, handling, finish, ect. for each would be appreciated.