I have both the MkV GTI and the Clio 200 Cup.
I think the GTI is a better all-rounder - more torque for daily driving, more comfy suspension. But it does not handle like the Clio in any way. It's just a fast hatch... But not a particularly special one.
The Clio RS is far more focused; it has a keener turn-in, the suspension isn't for everyone and it feels pretty darn special. But like every niche, it has limited appeal to the mass market I think. The car might not be fast on paper, but you'd think you're going fast because of all the good sensations you get driving it. That's good enough for me.