Prophet standard to compact kit..

I was doing a little research on the RTI compact and found that a compact conversion kit was offered.. which I think is a great thing!! ( I own the Prophet performance 22lr )...In the kit you get the smaller CF bottle, shorter shroud and side panels.(barrel of the caliber of choice is extra) my question is.. isn't the standard and the compact side panels the same?? If not what's different between the 2?