You know both variations, the "high red" or "red-factor" Anconas you posted last, and the darker ones have that black and white mixed into their feathers which is very reminiscent of a Mille Fleur pattern. I wonder if you can achieve a solid red bird with only white mottling? So literally a red version of the normal Black Ancona.Here are a few pics of some chickens with more red on them....
So according to Google apparently you can. lol