We raise Black Java's for egg layers - and the 'extra' cockerals that are produced are therefore table birds when big enough (or fiesty enough to get rid of!). I keep 1 rooster at a time. Our first rooster lived 18mo before he became too cocky and obnoxious - his replacement is now grown and filling his shoes, so to speak. So next spring, I'll likely have more baby chicks - the Java's make good momma's - had 3 of 5 hens become broody and succesfully hatched out chicks. This next spring, I'll have 8 hens, so perhaps more chicks? We'll see!
I raised Freedom Rangers (what you're calling red rangers) this past spring. I was very very pleased with the breed overall. There was a great canidate for a keeper rooster and hens - but I chose to stay with the Java's as a primary flock. They are all in Camp Frigidaire. Tasty tasty birds! Tons of feathers though - we ended up skinning them instead of plucking. It seemed that they had an outer layer of feathers and an inner layer of feathers (not down, but close). Very pretty birds to watch - most were very friendly to us all - and while they were hungry, they generally allowed me through the gate to feed 'em.
This fall, I'm raising CX's. Overall, I find the CX's to be less to my liking as a chicken in my yard than the FR's. The CX's are a bit more feed aggressive than the FR's were - and I don't find their nearly naked state of being very attractive (my sons have pointed out to me that when they breathe their bum's suck in and out - never noticed on the FR's). I find it nearly impossible to get through their gate to feed them and they peck me (shoes, socks, hem of pants, freckles, raincoat snaps, raincoat zipper, bucket, whatever they can reach) all the way to the feeder. I've been feeding fermented feed - and have ACV (apple cider vinegar w/ the mother in it) in their waterer too - so the level of poo isn't that bad from what the FR had left behind.
However, there is something highly attractive about 9wks and done with the CX's. The FR's really needed the 12wks. And by that point, the boys were learning to crow (not too bad if you've only got a few - but we had 15 boys!) And being in suburbia, and illegal to have cockerals - well, that just didn't do real well. I'm pushing my luck with my one Java roo. So keep your environment, neighbors, ordinances and other 'politics' in mind when choosing. The CX's won't ever get big enough to learn to crow - or that's my hope at least!
Since we've not yet eaten a homegrown CX, well, can't compare on flavor. But I did notice on the FR's that the hens had a lot more fatty tissue around the edges of the breast (like what you see in the store) than any of the cockerals did. Processing ourselves, we could simply snip that off right then and there!
Because any of these meat breeds don't take long to grow out - try ordering a small batch (Welp Hatchery is where we got our CX from) and giving some a try. If you don't like 'em, you're only out a few weeks. With DP birds, you really need about 4mo to let them get big enough. We butchered some extra Java roo's at 17wks, and they were so scrawny...nothing like the FR's.