You will defnitely notice the difference from a standard 1/2 ton but seems to be about 70% from the E tires at 60 psi. You can feel all the small stuff in the road. I have them at 40psi now for winter (don't tow heavy and better traction) and brings the ride back what I'd expect in a 1/2 ton. Off-road or when on rough roads, it feels firm and stable like a 3/4 ton but less harsh. To me, it's a good balance. The increase in stability while towing feels like they could give it more than 500lb increase in GVWR over a Max Tow. The improvement is not small.
If you were coming from a base 1/2 ton, I'd give a fair warning. Coming from an F250, nothing to worry about. You will like it.