I remember someone telling me that PSA likes to see a focused heel, but that's the only difference I am aware of... not to say there arent any more differences, because there are... but thats one that always stuck in my mind lol. As for a Pro of PSA... more recognition, more training and trialing opportunities nationwide... ASR and PSA should merge lol. ASR seems to be primarily concentrated in the south east and further up the east coast, no real national recognition, certainly no international recognition beyond people who see it mentioned on message forums.