Ah the old unfounded cliché once again... oh well, I'll try it again.
France and especially Italy might have more big mountains, but Spain has enough tough mountain passes and MTFs to design three or four routes harder than this one without repeating once. The fact that many of them have not been used
does not mean they aren't there and raceable. Read my first two posts in this thread for some of them:
http://forum.cyclingnews.com/showthread.php?t=11538
They climb Ancares from another side this year, very hard too, HC, but not as hard as the one I posted.
Again, those are only the ones that
have never been climbed in the Vuelta, to these we should add all the tough climbs that we all know already. There are others, like Cobertoria east, descended but never climbed and also a legit HC:
...
Or these two sides of Haza de Lino:
...
And that's not all, there's La Marta, Llano de las Ovejas, Ermita del Alba, Collado Puerco, Venta Luisa, Fumanya-Pradell... and I'm talking only about the real tough ones, not just standard 1st cat.