I've looked for photo's of these surgeons results that are not on the surgeons site and found some for Suporn, a couple of Chettawut and nothing for PAI. I've also seen one Suporn result in person.
All that basically makes it very difficult to compare aesthetics, so for me PAI is risky, and from what little I've seen Suporn is better than Chettaut.
For safety I'll go with what Warlockmaker's said, that PAI is a top hospital, Suporn is a normal hospital, and Chett's working out of a small clinic. The complicating factor is that the hospital itself should only make a difference if you're about to die, and that's either bad health or the surgeon screwed up (and never happened to any of them). Chettawut's setup makes me nervous, but between Suporn and PAI I don't know. I'm not aware of problems with either safety wise.
Aftercare I don't know. Suporn's famous for it, Chett seems good as well. PAI no idea as there's not enough written about it.