Obviously, wins are a dumb stat. Against Brodeur you can point out (Roy has) that with the advent of overtime and the shootout, his win totals are a little inflated -- he's still thirty-odd regulation wins behind Patrick. On the other hand, he lost a season (near-peak) to the lockout; he'd probably have those thirty-odd regulation wins by now (plus those four more shutouts to pass Sawchuk) if it wasn't for that. As it is, there's no reason to believe he won't get them next year, and maybe fifty more wins and a dozen more shutouts in the two years after that.
So then you get the argument of how best to judge an athlete -- by peak years (in which case Hasek and maybe Ken Dryden stand out, post expansion) or by career total (in which case it's Brodeur, sawchuk and Roy).
Amusingly, there's a whole stathead blog dedicated to proving that Brodeur is overrated -- <link>.
A more balanced discussion here: <link>
In Marty's favour (apart from his amazing consistency and durability) is, irrationally and unacceptably, his likability. Roy and Hasek are pricks and were prima donnas; Hasek in particular sullied his career a bit (in my eyes at least) with his final flake-out stints in Ottawa and Detroit. Ken Dryden is a politician; Terry Sawchuk was a depressive alcoholic from Winnipeg (redundant?). Brodeur, on the other hand, is decent, articulate and universally liked. And he looks awful cute smoking those victory cigars.
<link>