I think I was hooked on both of them for about a year or so after buying them.

Now that I've played MTW2, though, I have a lot of trouble going back to RTW. I don't care about the graphics so much, but I find the battle and diplomatic AIs much weaker in RTW, even in vanilla. With moddable diplomacy in MTW2, it's even harder for me to go back.

I'm just waiting for EB2 or a Rome era mod for MTW2.