Well, I saw a commercial for new design pull-ups earlier this week, and I finally got my hands on some. I thought they would be exclusively "Monsters" designs, as shown in the commercial, but to my surprise, they were a mixture of "Cars" AND "Monsters"!
There are some changes between the old red sided Cars style and these new Pull-Ups. First off, they are very noticeably SOFTER. The little fastening tabs are gone off the sides, and they seem stretchier than before. The side materials are also softer. The sides STRETCH waaaay easier than they used to.
As for the fit, they seem to fit much better than before. They stay up better, especially when wet. They almost seem like they ride higher than before, but I have not actually comparatively measured. The colors are much more vivid, and there is a LOT more attention to detail. The fading designs are a speedometer reading 100 MPH on the "Cars" Pull-Ups, and a trophy on the "Monsters" Pull-Ups.
As for absorbency, they are almost exactly the same as before. As for durability, I have yet to wear one overnight or to mow the lawn to truly gauge this, but I did wear one wet for ~5 hours, and it did not show any signs at all of separating or tearing anywhere. A major improvement over the last style!
Summary: The designs are bright, fresh and fun. The fit and feel is significantly better - much, much softer - the sides have more free play, the sides are softer - the diaper feels all-around bigger than before - stays in place, even when fully soaked (the old ones liked to start riding down when fully soaked). The absorbency has stayed the same; 1.5 - 2 normal sized wettings, 1 large wetting. The durability is much improved, I think due to them being possibly larger, or having improved sides. Overall, if you enjoy wearing Pull-Ups, I think you will be pleasantly surprised by this latest product iteration.
For the record, I am 5'9", 140 lbs, with a 29-30" waist