Yes, I see the difference. Although my chicks seem to have coloring more similar to your cockerel's except with less white.
They were more pale a few weeks back, but not quite as much as your pullet chick. I imagine that could vary depending upon the source of the chicks. Mine are hatchery-grade.
Yikes! One of mine has a puffier tail, sort of like your cockerel. Although, I've seen puffy tails on young pullets before when I raised a few RIRs.
I'm a mess worrying about a roo....can't have them in the city.
Thanks for posting!