Other things he can do…
His counter move always function as his EX version. This means there is no guesswork involved in high and low reversing. His palm strike (in addition to having superarmor) travels further and much, much faster. His fireballs come out faster (I think).
And I fought him with M.Bison (Dictator), so I’m assuming you can fight him with anybody. Also in one play, I did a best of 3 and lost a round against Seth, and still fought Gouken. I didn’t win any rounds with a Super, won a lot with an Ultra, most rounds with a first attack and I think only 2 perfects. Weird.
Hope some of this info helps!