I'm not saying he doesn't like playing on clay but Almagro is the better player on clay. It may be Stan's favourite surface but definetly is Almagro's fav too and in my oppinion he's more solid and should take the win
I think Almagro is slightly the "better" player on all surfaces at the moment and by better I mean one who is able to get the most out of what he can do in every game, like Ferrer has managed to do consistently. His record on clay is "fearsome" but lest we forget, Stan's biggest success in his career has also come on clay. I always rate Stan a little better on clay than he's on other surfaces but he's an all-rounder, whereas Nico can be considered a clay-court specialist.