Sculpting what you Invision and what you get

Hi guys..well I put some color on my head sculpt..I had cast two heads and had troubles with bubbling so I decided to see what she would look like on one of the junk casts..Sculpting her I had in my head what I wanted her to look like and after months of trying I was totally happy with her sculpt..(not that I'm unhappy with her I love her little face) but she looks different than I thought she would..I've said it many times I paint like a rock swims it truly isn't my forte so maybe that is a factor..she is coming along I'm going to start priming parts soon while I'm waiting on new casting materials..maybe with a wig and a real faceup I'll have the vision from my brain..lol..my question is has anyone else had this happen..so here is a couple of pics..please excuse her air bubbles and my crappy paint job..hugs and Happy Holidays to all