Dr. Pepper or Mr. Pibb

At one time Dr. Pepper was independently owned and sold the rights to different bottling companies. So in one region it was a Pepsi product while in others it was a Coke product.

Personally I can't stand any of the Dr. Pepper type products and will drink any other soft drink flavor over them.
You are correct. When I worked for PH, our franchise had to carry Pepsi products. Company stores carried Coke products. Barqs root beer is the same. It was once independently owned and later sold their rights to coke. I could tell the difference after it happened. It tasted much better before the sale. After the sale, it was too sweet in my opinion . The root beer our franchise carried was A&W