Years ago we towed a little 2100 pound Toyota MR2 Spyder with manual trans. When cruising, it was invisible. When accelerating, it was well noticed. Because we did not have secondary braking for that light car, when braking, the car pushed the motor home extremely hard.
We been towing a Jeep Liberty now for a while since the MR2. It is twice the weight but is surprisingly little different when accelerating and cruising. But with secondary braking installed on the Liberty, it actually helps slow down the motor home.
Surprising to me, in my experience the weight of the tow vehicle makes so little difference when cruising and accelerating. But it is so well noticed compared to not towing anything at all.