Scherpschutter has a great review of “Kill or Be Killed” (1966) up at the Spaghetti Western Database. His reviews are always perceptive and well written.
In other words: this movie is hodgepodge; it freely borrows form Hollywood classics but we have arrived in 1966 and the style is mostly Italian; Boccia (working as Amerigo Anton) handles some of the material well, but doesn’t know what to do with those scenes set on the Drumond ranch and therefore the second part of the movie occasionally feels like a Hollywood B-movie; there’s even a would-be funny old man of the grumpy type, who talks to his dog (who is smarter than he and saves the hero’s life). The ending echoes the final events of a knight’s tale, with our chivalrous hero – fancied dead by his sweetheart – arriving just in time to prevent the poor lady from marrying the black Knight – sorry, the evil Chester Griffith.
It would take Boccia one more effort to strike the right chords; his Kill the Wickeds, made one year later, is often called a minor genre classic. But even this small entry isn’t all bad; the shootouts are quite good, but there aren’t enough of them (it’s not a particularly violent movie) and the brief and sudden action moments are better than this protracted finale, which goes on far too long; the best scene, is the one with Ringo surprising four opponents in the main street (a clear reference to the famous scene from Tessari’s A Pistol for Ringo set on the children’s playgound). The score is a grab bag of tunes, some bad, some good, but hardly ever creating a real spaghetti western atmosphere. Kill or be Killed is not as bad as some may tell you, but I can only recommend it to aficionados. If you’re relatively new to the genre, there are many other entries you should check out first.