You know this is really interesting. I love Yotsuba as much as I hate Uruka, yet now that I think about it they really are similar in terms of story, personality and physicality.

I guess the only difference between the two (and really the reason why one is better) is that Yotsuba is a lot less obvious in terms of feelings. Despite being canonically the worst liar, she has been doing a pretty good job of hiding her past. Uruka, on the other hand, is not only completely obvious but shot herself in the foot when Nariyuki straight up ask her if she liked him.

I can't respect someone when they had victory literally handed to them but then throws it away.