Metal Gear Solid 4 vs Super Mario Galaxy. Which is the Greatest??

[--OkeyDokey--]

My two favourite games this gen ;_;

Both of them blew me away the first time round.
Galaxy kind of lost its magic by the third playthrough but I've only played MGS4 once (waiting for trophies >_>), so I'm still stuck with my first impression on that one.

For that reason I say MGS4, but it's close...