In the 70's when alot of Spaghetti westerns were introducing comedy elements, alot of U.S westerns were often going the more violent cynical way. So for me U.S westerns of the 70's are far more interesting on the whole than 70's Spaghetti westerns. Not necessary in the Spaghetti style these 70's U.S westerns, but well worth checking out films like; Chato's Land, Ulzana's Raid.
Agreed. Several westerns made in the late sixties, early seventies were influenced by the violent nature of the spaghetti westerns; The Wild Bunch is often called an 'answer' to the Italian western; among other things, it probably can be interpreted that way, but that doesn't mean that it looks or feels like a spaghetti western. I don't see much spaghetti in the movie. The death walk maybe. The films you mention neither. Nor do those American or British westerns that were shot in Spain, like The Hunting Party, Shalako, 100 Rifles, Chato's Land, Cannon for Cordoba, etc. Again: they were influenced by the violence of the SWs, but didn't look like them at all. Ironically some of Clint's and Lee's movies that were shot in the US or Mexico occasionally have some spaghetti western feel, notably Two Mules for Sister Sarah and Barquero.