the 197 weighs (about the same as an extremely obese man or two average sized men) more than the 172 so from the off regardless of 20-25bhp difference it's always going to be tight.
I agree that alot comes down to the driver and accurate gear changes aswell as how healthy the engines running in the current conditions.
In the end does it even matter anyway?
Some people would rather have a more advanced car in terms of safety and technology (197) whereas some would rather have the more raw, but little ripper who would surprise a few bigger cars (172/82) clio.
In the end all 3 deserve credit for some of the bigger and more expensive cars they can cope with and outmanouver etc.
All the above my opinions of course.
Now go out and torture other makes and drivers, not fellow renaultsport chaps