As far as the hats go, they seem similar to some of the Mexican ones I've seen from the same period. I suppose that makes sense, though.
There is a banditry museum in Ronda, Spain, where I lived that has some amazingly well-preserved clothes and weaponry from the same era. Actually, if you ever get the chance, Andalucía was very similar to the American Old West in many ways.
Howdy again sir fotosdenada! If I ever get the chance to what? go there or research it? It sounds very interesting and yes the Americans just had their own version of the Mexican sombrero which does make sense. good points sir!