It was not meant to be tongue in cheek so far as equipment is concerned - I do think the standard Cooper is under-equipped. However, I too could have bought a 206GTI but bought a Mini instead, so this should show my overall opinion of both cars for my circumstances (i.e. rear seat and boot space are not a priority).
I also agree that the 206GTI is not a classic like the 205GTI and that Mini will be (or already is!).
I have owned a Peugeot before, a 1991 205XS which I kept for 5 years. It actually lasted really well, though the perception of build quality was nothing like the Polo I replaced it with. The Mini gives mixed build-quality messages - mostly the quality is very good, but the effect is spoiled by rattles and creaks. And though I like the "silver plastic sword" interior trim, it doesn't really scream "quality" - more "fun" which is such a key element of the car.
I also agree with lightbody that the Mini's appeal is down to fun. It may be poorly equipped, not really all that fast, there are other cars that handle as well, but overall it has some kind of magic.