SF is way better, not only because of the more original characters(outside shotos blahhhhh x_x), but the play mechanics if you look deep enough is WAY deeper than MK. Theres a 50 page game mechanic on CvsS2 alone on GameFAQs written by a tournie top player named Buktooth..i really dont think theres anything even close to that on MK. MK is all about graphics and fatalities, SF in general, provides and focuses on whats important, the gameplay depth.