182/172 rear beams are stiffer & wider (or is the wider rear track achieved with disk brake gubbins?) than non-sport beams. No doubt mountings are identical though so physically possible to fit either.
Not sure if trolling or just getting confused between the totally different European & American meanings of the phrase "fixed beam."
In Europe a fixed beam IS semi independent. In America a fixed beam often means something entirely different, which happens to be non-independent.
Ironically probably THE most popular way to make a Clio quicker around a corner involves making the rear much less independent and more "fixed" in roll (whiteline arb, pms strengthening kit & 500lb/inch springs all aim to do this...)