I raised some red broilers this summer from Ideal poultry. I also had 3 cornishx hens that came with some feed I bought. The reds grew slower than the cornish did, but would go out and range outside all day. The cornish stayed in the coop constantly. That being said, I preferred the cornishx over the redbroiler, for butchering, and eating. The reds had a yellow skin, and when I plucked them icky yellow fat came out with the feathers, and when I cooked them, long and slow has been the best way, anything else they turned out tough. They did have a good amount of breast meat though.  Now, the cornish cross, had white skin, and no ugly yellow fat on it, I have cooked one half of a hen, and it tasted very good.  If you are raising just to resell, the reds are probably your best bet, they will freerange, and not eat nearly as much, they were all healthy, but for my own preference, I want a white-skinned chicken.