Quick Question Regarding RT2000 p/i

I know all other differences I believe (Color of Driver, Different Front Materials, Different Xover), but is it true that the P's has a higher wattage amp than the I's?? Doesn't make much sense to me considering the I's came later O.o A fast, accurate answer would be greatly appreciated!
LivingRoom
Source: HTPC
Display: GT720 (on the wall)
Receiver: HK AVR1700
L/R: RS850 Signature
Center: RSC200 Signature
SS: Onix Rocket ELT DPA
Sub: SVS PB1-ISD

2 Channel (in the making)
Source: TBA
Amplification: TBA (Integra 2.1 interim)
Speakers: AV123 Onix Rocket Strata Mini