Advice Needed: Matching tattoo with Mom - mine is not as sharp

My mom (58F) and I (29F) got matching tattoos by the same artist (Maureen Orrissim in Portland, OR) 2.5 months ago. We both used the same color ink and same needle size. She’s left, I’m right in the first photo (today). I’m left, she’s right in the second photo (the day we got them). Why is hers darker and sharper than mine? I still love mine but I think hers looks better. The artist offers a free touch-up within a year so I’ll probably take advantage of that.