That should be a fun project. I wasn’t aware that Red Rangers were hybrids like the Cornish X but from a quick inter net search, it looks like they probably are also a four-way cross. Good to learn something this morning.
I have no idea what is in the color and pattern genetics of either parent, other than from those chicks it looks like the Cornish X are pure for dominant white. So the chicks from this cross should wind up mostly white, though you could get some interesting combinations. If you save and breed chicks from this cross, that‘s when you should get some really interesting color and pattern combinations. Crosses of crosses can get pretty wild.
It will be really interesting how these grow out. I suspect you will still get really great growth rates and probably could see health related problems from growing so fast. But that’s a guess. Hatching eggs is how to find out so you are well on the way. Good luck!