This is just wrong.
Kory is a statue compared to Clark. The fact that she can fly quickly has nothing to do with combat speed. Clark is a legit near-light-speed reaction guy, Kory isn't even a speedster, at least not that I've ever heard.
And you can't compare Kory to Diana - Diana is a bit slower than Clark and a hell of a lot weaker, but she's orders of magnitude faster, by feats, then Starfire.