Dejounte to me the difference between the two is subtle, but significant. The "wants it" guy is the guy driven by winning above all else, and he believes he is the one to deliver the win. When he doesn't, he beats himself up and obsesses over it until he next opportunity. The " it" guy, on the other hand is more of the sense of "someone has to try to get this win, I guess it might as well be me", but if he falls short, no big deal... I did my best. To the " it" guy, it's a very laissez-faire approach ("it will be what it will be").
I'll once again disclaim that this is just my reading of the situation, and I am likely very wrong.