In the Red Breasted mutation there is a wide variation from lighter to darker ones. This just happens to be a lighter version. Some people call the lighter version Darth Vaders since the males have a solid black head but the hens of the Darth Vader are quite light compared to regular Red Breasted. I have been raising these guys for quite some time now and know this is a Red Breasted. It may be a hen as they are lighter as chicks. The Red Breasted you posted Akane most likely turned out to be a male. They are darker as chicks than the hens. The Red Breasted Button Quail is the only mutation that you can sex as chicks.