Because A PSN Account can only be linked to 1 SE account, I know I read that somewhere before I even registered my PS3 code for beta or EA. Not sure of where, but I distinctly remember it, so because your PSN Account is linked to your beta account you CANNOT link it to another SE Account, not sure if you can get them unlinked, and not sure if you'd have to contact Sony or SE about it either.

This is what I remember, if I'm wrong, someone can feel free to correct me, that and I'm not the best at explaining things.