C vs E vs D Load Range, does it make that much difference?

Been reading up on tires and there seems to be some disagreement on whether to run c, d or e load range tires, I currently have 33" e and im about to go to 35" (315/75/16) staying with e load range. Is there actually a noticeable difference in ride quality/mpgs? I have skids, sliders, bumper, winch and extended travel kings already but still always like a plush ride

 

Load range E are generaly heavy and more stiff than C & D but not all C,D, and E rated tires are created equaly. A 3 ply Load range E tire is going to be heavier and stiffer than a 2 ply Load range E tire. If you are going to a larger size you will need to reduce your air pressure to get a less harsh ride since your vehicle weight is not changing but your air volume/load carrying capacity is. Hope this info helps but if you have other questions let me know.