For the benefit of the OP I believe that it takes the F4R a fair few miles to run in properly (I'm talking about 25k) to reach it's full potential.
It's already been proven that well maintained 197's produce much better figures after the miles have stacked up.
I think 197's being underpowered is just a myth really. Miles, long trips, 6k oil changes and V-Power turned my R27 into a weapon. I sold it at 36k for a 200 and by then it was like a bullet in a straight line!
If it was underpowered I would have not got the 200 and would have looked at something else