WELP!
You cannot always be one of a kind*.
Ain't that some shit.
You're now like the kids who trace Betty and/or Veronica poses from the comics and then just draw different clothes on them, sending them into the publisher to put in the 'fan art' section.
"Look what a good job I did Mommy!"
*While they are similar in shape.pose.subject matter (face) they are completely different in mood.shade technique.detail.and eye-bag formation, it is natural to borrow from drawings if the blue print of them is easily made into something new. I would say you're doing fine.
I'm lovin' it!
Pen on paper makes marks that are divine.
Unless of course, you are I.
Then it is just banter shaped like cats.