I don't know. I think the sliding windows would be much more useful than the stupid half catch that leaves the doors partially open. I've never used them and never will. My 1100 is camo and I ordered the heavy camo seat cover and installed it before I ever used it. It has held up great and I really like it. With larger and more aggressive tires on mine I was really disappointed in the power and almost got rid of it to go with a Ranger. I'm glad I didn't.
Instead, I added a turbo to my RTV1100. Talk about a difference! Wow!! In M range I can leave two black marks taking off on concrete. I made no changes to make it go faster. Twenty five is fast enough for me. It just gets there much faster and holds that speed much better. Trail riding improved 100%. Unless I'm going to go up an extremely steep hill, I pretty well just put it in M and drive. The combination between the turbo and the coast valve has made it pleasant to drive. If I would have gone with a Ranger I would have REALLY missed my A/C in the summer! We had a warm stretch a few weeks ago with temps in the 90's. I worked several days hauling dirt, bales of straw and pulling a cultipacker with my RTV1100. It works like a dream now.
I do have a 2" lift kit on mine to get the 27" Maxxis Bighorns to clear. According to the speedo, it runs about 27 mph on a flat paved road. According to my GPS, I'm running right at 30 mph. Either way, it's fine with me. I'm sorry that I forgot the name of the guy on here out of FL who made the custom toolbox for the RTV's, but I'd be lost without that as well. I love having all the tools I need in that toolbox that is black powder coated aluminum diamond plate just like in pickups. My only regret is going with Line-X for the spray in liner. I had Rhino Liner in my RTV900 and I like it much better than Line-X. I went with Line-X because that's what Kubota uses if you order one with the factory sprayed in liner. It's not nearly as thick as the Rhino Liner and is harder, allowing things to slide around more. I liked the somewhat softer material that is thicker that Rhino Liner uses.
I don't have my turbo turned up but about half way on the settings and it does all I need. Based on other applications that hydro is used in, I'm not at all concerned about hurting it. I've put more hours on the RTV1100 in the last 2 months than I did in the first 2 years. Until I changed to the coast valve my wife wouldn't drive it. Then she got mad because she couldn't haul heavy loads of dirt for her landscaping up some of our hills. With the turbo, it now handles those loads with ease in L range seemingly without stressing anything. I'm really glad I stayed with my RTV now!