The seats (coach and Envoy) are a completely new style, according to prior comments in this and the usaviation.com forum. The IFE will also be different than the Sony Passport system used on the 333's.
I have read this as well but I haven't actually seen anywhere where it was posted officially. I would love to see or read about the new Envoy seats if they are in fact changing them in the new planes they order. Anyone have any concrete information on this?