hehehe I dunno...my friend used to be a crazy SF fanatic.....but after I asked him about Oro, etc...he said SF's getting lame with all these new characters. I guess he's not interested anymore. But yea, he's always favored SF's story, fighting, gameplay over MK. I for one, have adapted to button-tapping rather than rolling so MK suits me better.
I think MK verges on being more "mystical" or "surreal" (demons, outworld, gods, sorcerers) that pay homage to various popular cult movies (shaolin films, Big Trouble in Little China, hell MK1's story reminds me exactly of Enter the Dragon--Liu Kang = Bruce Lee, the evil Chinese guy with the claw= Shang Tsung, the white dude proving he's not a fake = Johnny Cage, tournament on an island, even Bolo sounds like Goro). SF to me is more colorful and modern. Chun Li, Guile, DJ, Cammy, Ryu, etc--they all seem to be able to exist in our world today. SF even tries to be realistic by saying how the hadoken is like the exertion of chi similar to blowing a candle out with your hands (as the old series explained). It's definitely a different flavor.
I thought the ninjas in MK got lame as well after the appearance of Smoke in MK2. I thought that should've been the last one...but then Ermac, Rain krept up (yes I spelled it with a "k"😉. Seriously, did the ninjas all get together and decide which color outfits they get to have? 😛