At 14 weeks those combs and wattles are very red. My RIR girls are 16 weeks and their combs and wattles are not that red. I was led to believe that a hens comb and wattle goes red right before they start to lay. That being said the body structure and posture are not screaming roo to me. I...
It's hard to tell from the photo, but a Cucko Maran will have gray colored legs. Either way the lighter one is a roo. In both the BRs and CMs the lighter is the Roo. Seeing these two side-by-side, along with the comb and wattles and crowing. Slam Dunk ... Roo.
My gut tells me it's photoshop. A quick google search only showed this one picture of a "blue" comb. There are several references to poor circulation or frostbite causing a blue or purple hue to the comb, but the don't mention a completely blue comb.
4 weeks is kinda young to get an accurate assessment of the gender for these chicks. Give it another month or so and you will have all the opinions you want :)
I am very new at the Maran breed, so I recommend PM-ing someone like Donrae. She is very knowledgable about the Marans and BRs. If I were to hazard a guess it would be a BR. This guess is based upon the eye color and leg color. I have two Cuckoo Marans and they both have a gray color legs...
I am very new to the Maran breed, but at 11 weeks old I would say you have a slow developing Roo. That is a huge comb for 11 weeks and the wattles are coming in. This is what my RIR roos looked like at 11 weeks.
There is a variety of Maran that have feathers on their feet. The French Maran have the feathers where the English Maran do not. And yes Marans have a single comb. It is hard to tell in the photos the color of their legs, but my Marans have gray feet, those in the photo look yellow, unless...
All sussex varieties are supposed to only have white legs, this one has yellow legs. So not a Sussex or possibly a sussex cross?
http://www.americansussex.org/about-the-breed.html
Site notes yellow skin, shanks, or legs as a disqualification.