My 2 buckeye roosters look different

[ChickChic00]

I bought 10 straight run buckeye chicks from TSC about a year ago. I only have 2 roosters left. One looks like a buckeye, and one looks a bit like a Rhode Island Red with rose comb?? I have Rhode Island Reds and they have straight combs. I've not had any that where rose comb. Does anyone think he is a RIR Rose Comb? Or a Buckeye with a huge comb?? First 3 are of the buckeye which has the huge comb and thinking a rose comb RIR? And the last two are of my other buckeye rooster. Any help much appreciated!!

 

[nuthatched]

Interesting comb. like a mix between.