The Aitor's are the only Spanish knives I have bought so far. When I have seen Muela's advertised, the steel was listed as 440A. I don't recall having seen a Muela advertised as made from 440C. I stopped buying 440A knives simply because there are knives made from better steel for not much more money. Many knives made from AUS8 and 440C are reasonably priced, including the Aitor's, so why buy a knife made with 440A?