Ok well I like MGS better than Halo for storyline (even if most dosen't make sense), weapons choice, humour, and is different from other games like to beat Psycho Mantis you have to switch controller ports which explains why he won't die lol.
Halo is just a guy in a suit which you never see his face ever. Good story, most powerful pistol in the gaming history and infinite t bagging lol. Online is better than MGS but that's about it.