Except they don't
Chun looks a lot more like MVC3 Chun than SF4
why don't you compare Ryu? the models are clearly based off IV; look at his musculuature. both characters are slightly slimmer but it definitely registers way too much like IV. the differences aren't palpable at all, which makes this a visually disappointing first showing. it's not much to go by since its a tiny little teaser so I'm not gonna worry too much, but right now I'm underwhelmed.