Just judging on eyeballing it. I've owned a Wang/Rose P1 mask in the past. I haven't personally lined the two up before, since I've never owned a Brother Boar bio yet, but it looks to be just about right.
I used to own a DB P2 mask and a brother boar and for the hell of it I put it over the P2 mask w/mandibles on it and fit really nice,but I sold both awhile back.I say the DB P2 with a partially foamed dome for wearing or display.Hope this helps Paul?