Help! White spots and True/False Percula question!

[George]

That is not ich. It's too big to be ich. could be some other parasites. Without proper identification, I would suggest leaving them alone. Clown fish are tough and they will get over it. Are they still eating and acting normally otherwise?
Percula and ocellaris (true and false percula fish) can hybrid but it's very difficult. Hybrid of those 2 are commercially available but not widely.