From a thread I started asking the same question about a year ago. We rented a wolvie to run side by side with our tricked out Rhino for several days in the black hills:
My comments are based on Rhino vs Wolverine, not to compare against any other SxS product as I have no experience with those items.
The rental unit was a 2015 with 5000 miles of heavy rental use....still it impressed vs our 2008 rhino 450 with 1700 easy miles, extended wheel flares, piggyback shocks, after market EPS.
Bullets:
1. Shifter is much more fluid and easy to use...which means you use low when you should because it is easy to do so.
2. Door latches, so much easier to use and intuitive. 5000 miles and they still worked like new on the first try every time.
3. Door hinges...spring loaded metal rather than rubber straps that constantly break.
4. Power is plenty for trail riding, steep climbs and getting up to speed quickly on the highway going from trail to trail.
5. Seats far more comfortable and ergonomic.
6. Longer wheelbase "beats you up" less...better ride over the long haul.
7. More room and places to put your feet, especially as a passenger.
8. Suspension more plush, works very well on high speed and low speed bumps.
9. Storage is excellent...cab is much easier to "live in" for all day rides.
10. Seat belts lock and release easier.
11. Glove box is even bigger.
12. Far easier to see over the hood and avoid obstacles.
13. Parking brake level is SO much better and easier to use.
14. More tie downs in back...very helpful.
15. Center console storage and arm rest...excellent change.
16. Not as loud.
17. Smooth easy acceleration...you are at 30 mph without realizing it.
18. Torque forever in low gear.
19. MUCH better selector of 4x4 means you use it more often.
20. New grab handle rocks.
21. At the end of the first day I did not realize I did not have power steering until the owner told me.
(That said, at the end of day 2 I determined I would never buy one without EPS...lots of hard technical trails give you a work out.)
22. So much more shoulder and hip room.
It is like they sat down and went through every criticism of the Rhino they had ever heard and fixed it. I can't believe how well put together this abused and used machine was...and this was the FIRST YEAR of production for the model I was driving! WOW. There is simply nothing in the UTV/ATV world built like a Yamaha.
If I was in the market for a recreational SxS I would drop 10k on this in a heartbeat. For work the Rhino has the larger bed and dump box...so we are going to keep it for working around the acreage which is 90% of its use. However, I have decided I will never haul it back out here for trail riding again...just going to rent the wolverine. The experience is that much better and the cost of the gas to pull it out and back is over 50% of the rental cost. It is a no brainier.