Ok, just to point a few things.
(I might sound rude due to my language limitations, I apologise in advance).

My charmander and yours are the same, I would like to keep mine's face.

Charizard: you did a few tweaks I'm not ok with. I've put a lot of effort in those bewbs, so I would like to keep that nipples.
The beige area from the belly ends on her tits, not in her neck.
Remove the lipstick from the upper lip.
That definetely doesn't seem like a heart.

On a side note, when someone tweaks one of my designs, I'm always going to notice, I gave them birth. Mostly are things I can live with and I assume the people that colored them didn't notice or haven't enough experience (really dissapointed on the detail lost on Jenny's Vermillion scene, in there Jenny barely has any expression).

I don't jugde you for using mines as a base, I respect you have your own style, but please keep it for your designs. I think you would ask me the same if I was in your situation, it's no longer how much time it took to me to do those drawings but the time and effort I've put to learn to draw the way I do.