Baring some sort of stupid frame rate cap and as long as your PC isn't ancient, you are pretty much guaranteed to get a higher frame rate on a PC no matter what game you get. CoD might boast 60 fps on consoles, but many competitive gamers on a PC would gasp at the idea of playing at less than 200 fps. Mods can also be nice, but needless to say, it's all a mixed bag. Most games will also tend to have slightly better textures and a few bells and whistles, though I tend to stop noticing them after playing a few minutes.