Probably not exactly like him. When you cross to the RIR, you lose a lot of genes. Crests will be smaller, foot feathering will be more sparse, polydactily will be all over the place if there, tails will be longer, combs different, and general body shape off.
These are the f1 crosses; when you...
My apologies if I am explaining this poorly; I am not too great at explaining things.
I believe it's possible. That's why I suggested breeding the f1 crosses together; they'll only be heterozygous for the dilution gene, so some of their chicks will have the darker red coloration.
* Using one...
I agree with moonshiner, stick to breeding your buffs to your reds, and hatch a lot of chicks.
Buff birds, in comparison to a black tailed red, have the Db gene, which restricts tail and neck blackness, and the Dilute gene- which lightens Them.
Dilute is for sure dominant, and from the chicken...