Again... if the difference from P08 to REV2 is worth it depends on the needs... I for sure would not be able to produce the bank I just did with a P08... the FX section was used heavily to obtain the timbres, and the modulation matrix has double the amount of slots which is very often used heavily as well... also the variable waveshapes makes a huge difference and the polyphony is crucial for those types of sounds.
But other than that, there is not much difference... but for some, that difference is huge...