erm, mint would be 50k ish miles, near perfect bodywork and interior, every thing electrical working properly, full dealer service history.
I recently bought mine from a dealer in this condition (72k miles) and got a brand new mot, 6 months tax, full inspection inluding putting right anything wrong, 1 year comprehensive warranty, 1 year vw roadside assistance. It had two bad scratches on the bonnet so they resprayed it, three of the bbs wheel caps were missing, so they replaced them.
I paid much less than ?7k for it. So you could expect similar standards and probably lower mileage.
Clio 172 and VR6 are very different cars.
VR6 is a bit faster (controversial) but 172 handles better (until you upgrade the VR6 suspension)
There's all the usual benefits of vw build quality and reliability. Plus you don't have to live with the astonishing uglyness of a clio (my opinion

)
Test drive both of them properly and see what you think.
Of course there's also the sound and refinement of the V6.
