Jones is definitely better at fighting, and that is what they are both best at, so I would have to say that Jones is a better athlete.
In terms of how their raw athletic ability matches up, it's impossible to know. There is a video of Jones failing to dunk a basketball; however, according to his little brother the video is a troll job and Jon can easily dunk a basketball.
Also, since when is dunking a basketball the end all indicator of athletic ability. I would say that Jones running a 4 and a half minute mile is far more impressive than basically any guy over 5'-10" dunking a basketball