I think it's pretty obvious that they're the same person.
I don't really have any reasons besides that the PICTURES SPEAK FOR THEMSELVES.
You might not be convinced. But see how a simple wig, dye job, and fake nose, can completely transform our BoyBand Hero!
EGADS, I'VE BEEN SCARED TO DEATH!
This also is important because Nick Lah-shay (lachay? lashay? lache with an aigu?) is going to appear on Charmed for 'several episodes', and I think it's pretty clear that he's going to play Barbas's (COUGH KEVIN COUGH) best friend, because boyband kids stick together.
I HAVE NOTHING TO DO. =[