Now that I've finished my 3rd rewatch of The Guest, I can saw with absolute certainty that Choi Yoon is not built for running. At first, I was like, "Well, most of the people he's chasing are possessed" but Hwa Pyung managed to catch up with his father, nearly die, and have a pretty lengthy conversation before Choi Yoon reached the bridge, so I have to conclude that Choi Yoon always rolls a disadvantage on athleticism.
Also, Choi Yoon's default attack move is a flying tackle and that never fails to make me laugh.