One of the guys that I hunt with put an after market muffler on his Rhino that was supposed to quieten the "putt-putt" noise .... it did a great job.

The battery operated "high dollar" UTV's are extremely quiet, but the two guys in my hunting group that have had them were not happy at all with the battery life and overall ruggedness. They had a lot of problems with theirs. Som much so that one of these guys actually pushed his off a 25' +/- embankment into a large creek !!!

One of the guys has a 48 volt, 2-wheel drive, "jacked" up golf cart that does pretty darned good as far as getting around. But it has zip for power and cannot manage deep mud. He uses his primarily to get around in good conditions, and uses his Rhino for the rest of the time.

I have a Ranger HD that my buddies say is quieter than the stock Rhino or new John Deere Gator. I can't tell the difference frankly. But I am about half deaf anyway !!

My best buddy has a Kubota 900 diesel, 4x4 .... it is loud but so far has been very rugged. I do not have experience with any other UTV's.