I think that the P2i and the P2+ are the same. The correct name being the P2+
The main difference is an increase in MAUM from 2835kg to 2910kg.
Also the CAT A (now called High NR) facility is partially automated, that is to say that with the High NR mode on, the NR will decrease when airspeed passes 55Kt on the way up and increase when the airspeed passes 55-50Kt on the way down (up and down in this context meaning accelleration rather than climb!)