I actually have Fedora installed on my desktop, and Pop_OS installed on my laptop! I’ve always been a big fan of the RedHat way of doing things (Yum / DNF & RPMs, the fs organization, etc), but I’ve gotta say, I really prefer the Pop!_OS user experience when I’m in the GUI.
As others have said, it probably doesn’t matter which one you use if your primary purpose is gaming. They’ll both run Steam’s proton engine just fine. If you’re looking for COD, specifically, you’re likely going to run into some issues; ProtonDB says that support for those games is not perfect. But a lot of games will work just as well on linux as they do on Windows with it.
Shit - I love “Commandos”. Such a rad game.