From what I have read, the Citroen/Peugeot engines respond quite well to simple breathing mods such as an Induction Kit. The Clio on the other hand, especially the Renaultsport variants, gain very little in terms of peak power. This could be due to the airbox on the 172/182 already being a well designed piece of kit..... but thats just a guess.
Avoid an open induction kit at all costs as this will lose you power due to the high air temp in the engine bay (although they do sound fantastic on the Clio!!). Hot air is bad, cold air is good!!!