Wouldn't their wattles be the same size if they were both boys? Oreo had feathers long before Cookie and only recently developed any kind of wattle. Maybe Oreo is a slow developing cockerel?
Just curious, reasoning? Oreo had feathers much sooner than Cookie. Cookie has irradecent green/purple feathers. Also their mom had 5 toes and black eyes and Oreo has black eyes and 5 toes. Cookie has light eyes and 4 toes like dad.