Weird, never heard of a 1.6 Si 16v. It's either 1.6 Si 8v, or 1.6 RSi 16v. The only Clio I can think of with full leather seats is the 172 Exclusive, even the standard sports models only have half leather.
Do you have an electric sunroof? Electric drivers seat? Heated mirrors?
Edit: Just seen the photo. Tbh pal, I haven't got a clue. If it's an Si or RSi it should say it on the door badges. However it does have an electric sunroof, so I'm not sure what else it could be! Some cross-breed by the look of it.