well if roosters don't count then I shouldn't worry about the 10 BY mix teens I have running around.... lots of room yet! LOL
x2!
Nope, totally different breeds, both are developed for use as meat birds, but the CX grow obscenely fast, ready to butcher by about 8 weeks and tend to have trouble with heart failure and leg issues associated with the fast growth rate....
Freedom rangers are still a breed intended for butcher, but they are at butcher weight at about 16 to 18 weeks, have more leg and less breast and since they grow slower they have fewer side effect health issues and can actually be a realistic long term bird for a flock and be raised to adulthood with fewer special needs.
Neither of these breeds will 'breed true'... they are usually the outcome of a very specialized cross of breeding stock which the hatcheries carefully develop... the cross of the two separate parent line gives the offspring the 'hybrid vigor' to aid the fast growth, but when the offspring themselves are bred they rarely have chicks which are replicas of themselves, instead the offspring (though meaty) will revert back to following characteristics of the original cross stock the hatchery uses. These birds can be carefully managed and bred in your coop, but it would take very careful management and breeding practices to get back to the 'meat bird' you originally bought as a chick from the hatcher.
Using them as breeding stock is more realistic for the rangers though, simply due to their better overall health and possible longevity. CX are designed to put on massive weight in short time and don't get good bone length or strength to give them good breeding potential.