Sweet deals you got there!
As for the helmet, the P2 guy, or "Pussyface", as he called in the fan forums, definitely has his mask off longer. It's actually off for the whole final battle. But since I have a few Predators with no mask (Elder, Lost, Shaman), I opted to get the masked versions of both "main" Preds.
I bought the TRU 2-pack (still available at some stores) and sold the half-cloaked Berserker. I have to say, I love the masked P-face Predator, mainly because I had this poster
hanging in my room for pretty much my whole teen years, and that shows him masked and holding the spear. The 2-pack also includes a skull/spine and a Predator skull. I didn't collect the Rodriguez Predators
movie figures, but I liked the Predator skull accessory.
It would be ideal if NECA would give us both heads and have them be interchangeable, but that doesn't seem to be happening.