Thanks Carlos, undoubtedly there is a certain resemblance between the two. I may be mistaken, but it seems to me there’s no complete correspondence (see for example ears that stick out); besides, in this one there’s only a minority French co-production (Pierre Cressoy and Bernard Farber), so the presence of Spanish actors as Angel Ortiz and Jack Rocha is unlikely.
Speaking of Bernard Farber, since his presence in the film is sure, are there certain pics of him?
Westernsall’italiana.blogspot.com says that Alfredo Rizzo (the pic below is from Il venditore di morte/Price of Death) plays “Buddy”, but I haven’t seen him and in the Italian dub there isn’t a character with that name.
These are one hundred per cent certain roles
Ignazio Spalla/Pedro Sanchez = emigrant (not henchman)
Andrea Scotti = man questioned by Peter’s henchmen (not Slim)
Gino Marturano = Brad
Franco Lantieri = Slim
Massimo Righi/Max Dean = ex-Confederate bandit (not Brad)
Luigi Tosi = blacksmith
Pietro Ceccarelli = Rex
Osiride Peverello = bearded avenger at the end of the film
and this one is not confirmed yet but highly probable
Giulio Maculani = member of Brad’s gang called John
In the original version the character played by Benito Stefanelli is called James.