Edge holding of Spanish brands (Joker,Cudeman,Celaya,Exposito,JJ Martinez,etc)?

[lonestar1979]

How is the heat treat on these Spanish knives made by Cudeman,Celaya,Joker,Exposito,etc?The steels that they use are Molybden Vanadium,and 440 stainless.How do these steels compare to other modern steels,I know some will say theyre crap LOL,but I have been sharpening for long time and can put edge on in no time.Maybe some of them use 440c,but am not sure.I plan to order few of these knives and use and edc them,but cant find a lot of info on them,in English especially.Any info is welcome.