Kudos on the inclusion of the old NES Duck Tales game! Fun stuff.
Whereas I think SFII may be their most significant game in that it created and defined a genre that was just enormously popular in the '90s (seriously if you weren't around for it in the arcades, you may not realize how popular it was), um...they had lots of technically better games. For instance, SFII has very easy dizzy combos that are basically 100% damage combos, lots of glitches ("handcuffs," et. al.), you couldn't both choose the same character, lots of "hamewaza" cheap traps, and a third of the cast was not selectable.
It's also a kinda ugly game with awkward graphics.
I think Cap's best-made major title might actually be SSFIVAE2012 or whatever.
Ryuuga Gotoku (Yakuza) series text FAQs available at GameFAQs PSN: hatoriki_kai, XBL: hatoriki, YouTube: ryled, Twitter: @Hatoriki, Me: Bored