Lets put it this way, Shawn and Kev competed with each other throughout the 90's and both were considered two of the best.
IMO, Shawn was much better then Dex and if I can recall Dex never beat Shawn when he competed.
And when Shawn and Kev competed Kev beat Shawn in most of the olympias except 94 and 96 I believe.
So there's your answer, Dex is not even in Kev's league when Kev was on top, not even Shawn Ray, and he's much better then Dex.