The first Super Cub I flew/owned was a 1979 with 180 hp. I loved it, but I didn't have anything to compare it to. Then I owned a 150 hp PA-14. When we bought the 115 hp Super Legend, we had a 150 hp PA-18 that we concurrently for 3 months. The Super Legend out climbed the -18,got off and landed shorter, but was a little slower in cruise. The Super Legend is much lighter on the controls, but it is still pure cub.
I liked the 180 hp Super Legend, but for our use the 115 hp is about perfect. My father, daughter and I tend to fly alone. Most of our flights are local flights around Fort Worth or around our ranch in South Texas. We are not hauling moose or gold bricks. We haven't competed in STOL competitions although I think the airplane would be more than capable (the pilot would be the limitation). Once you get over the fun factor of climbing straight up, the extra hp just means higher fuel burns and fewer hours between refueling. I think the CC used to come with 24 gal tanks for 180 hp. 2 hours plus small reserve-not enough for me. With 30 gallons, I get 5 hours to empty tanks, more if I am throttled back.
I have not flown the Carbon Cub. Every report is that it is awesome. The criticisms are that the CC uses double sided tape and other weight saving construction techniques that do not hold up. I sat in a CC Sport Cub and grabbed the V-brace over the panel and was shocked that it "wiggled." I am sure it is plenty strong, but just not what I was used to.
Fly both and talk to mechanics. CC has clearly was the sales and marketing race. They are great innovators. Don't rule out the 115 hp Super Legend just for the bragging rights of a big engine.
Ed