Is this is an argument between personal opinion or financial success?
Because from reading the OP it seems 90% of people here are missing the point.
There is no "better" game, it's however each and every one of us like it.
I like CSS more, I don't play either anymore but I wouldn't say it's better at all, or try argue like a 5 year old that it is with the badly thought out reasons some people have used
CSS is better. MW2 sucks on the PC.
Everybody who posts will agree with me.