Where the 750 kicks in over the 550, where you will feel the difference is hills & plowing snow. If you have hilly terrain I definitely recommend the 750, don’t get me wrong the 550 will get the job done but the 750 does it much better. Can’t answer fuel economy questions it doesn’t work like that for utility vehicles. One guy can be a trail rider and constantly have his unit on the go and another might be putting around the house another might be loaded and towing and putting around the house, another might be working around the farm, another maybe working around camp doing food plots and dragging deer out, another might just use it for plowing snow. See the rabbit hole each of those situations will lead to different “fuel economy” this is why that question isn’t easily answered and I don’t answer it because I can’t.
We have two units in our family and both have similar issues. The cv boots, intake breather, and other rubber parts degrade into dust. The most dangerous is the park brakes both stop working. Finding parts is almost impossible.
