I'm not familiar with the Kioti's, but have a little experience with 3cyl and 4cyl. I had a NH TN65 that was 3cyl and now have a MF 1455v that's 4cyl, both with roughly similar HP ratings. Seems to me that the 4cyl runs quieter and runs smoother but uses a little more fuel. Other than that ???
Pretty much what Glenn said. I believe it is the smothest running Kioti engine in the whole line up, and along with it the DK. It's the 40hp engine with a turbo on it.