Sir, are you ASKING for war?
Seriously, I think both are great and make for great storytelling. However, I think there are more stories and moments of Dick and Kory having a genuine relationship that tips it over. I think it’s very possible for Dick and Babs to be just as good, if not better, but DC seems so reluctant to make it a couple that all we really have are little hints and little moments. As such, it only really feels like they should be a couple because, well, they grew up together, and while childhood/high school sweethearts are a thing, it takes a lot more than that to make a relationship that lasts.