Here is a good example of spaghetti western music with reverb and tremolo guitars:
Spindrift - Speak to the wind
https://www.youtube.com/watch?v=AEgNebSjNyABut I think the charm of spaghetti western music is determined not only by guitar sound, but also by different samples, precussion (castanets or ratchets) noises and whistle. Good example of western music where the guitar is not main instrument:
Dezperadoz - Deadwood
https://www.youtube.com/watch?v=oaj9n5T5prY Eridanus,
I may be revealing my age, but I am hearing The Ventures and Shadows in these examples. Both guitar groups were taking us through uncharted waters, musically speaking.
Sergei Leone's "Spaghetti Western" movie theme music was the first time that I had heard such "soul-grabbing" and I instantly loved the baritone guitar sound. The BIAB RT is an excellent replication by Brent Mason. I've used it in several tunes.
BTW, I've never seen your posts before. Welcome to the most friendly and knowledgeable forums on the planet.