Neither.
The only way to gage if a car is cool or chavy is to consider what Keira Knightly would say when presented with it or if you were to collect on your way to a posh dinner do. And to the 197/200 she'd probably say oh that's a smart looking Clio at which point you'd have to start explaining to her that its not just a Clio its an RS model which means it has a 2.0 litre 16v engine producing 197bhp with a stiffer lower chassis than a normal Clio, widely revered as the best hot hatch currently on the market....... And during this poor Keira has glazed over and vomited all over her new Jimmy Choo's as a result of sheer boredom. So to this I would say the Clio is not cool nor is it chavy, it's a geeks car one for only the purest of petrol heads. And worst still if you own an R27 and have to explain what makes it so special and different from the rest.
This said I own an R27 number 225/500 and I'm proud to say I'm a geek, a petrol head nerd and I wouldn't want it any other way.
One things for sure its not chavy, well not as chavy as this bad boy....