the overcolored/mossiness I'm referring to is the silver extending anywhere on the body other than on just the neck collar of the pullets. The brownish tinge I'm not a fan of, I tend to cull those here with that in favor of holding back those with solid black, and most preferrably those with the beetle green sheen to them. I think not enough consideration is given to using birds with beetle green sheen. I do not believe it to be an indicator of overmelanization as I've never found that to be true when breeding with them. All my best bird have it.
On the cockerel, when I say gamey, they will lack the beefy heft a Marans should have and instead have a shallower body type, a sharper tapering from front to back of the bird. If you are visual, maybe it would help to compare my avatar photo to your cockerel and see how the differences of the body type compare. He is very wide from front to back and was about 8 months old when that photo was taken.
got it -- Jack has LOTS of green-and-blue sheen in his black feathers (which i absolutely love), but none of the girls seem to have it. i'll try to get a picture of him from above -- he's pretty beefy, at least compared to my other chickens, but he's the first marans cockerel i've ever seen in person, so maybe that's just inexperience talking!
just for fun, this is a picture of my two isbar/marans crosses, who haven't quite started laying eggs yet -- as you can see, the black one has enormous green in her feathers!