Not sure about the 125 Sarah doll, but the Elfie doll is a pretty good doll from Sanhui. Here's a review of the Elfie doll from "Joninin". He offers a lot of great pictures and a good review of its body.
viewtopic.php?f=261&t=88196As for anything else, the 118cm Elfie doll comes with the textured skin like some of the other higher up dolls (like 145, 156, 158, etc.), the breasts have a natural jiggle even if you don't get implants.
I will say, as most people have commented on Sanhui's dolls butts, the Elfie's butt is firm like the others. But, I've heard a firmer butt is better in the long run, but you can still feel its soft skin and press down into it. You can get gel implants on the butt as well, but you'll have to think about longevity of the doll. It's definitely a must have for its size and weight, and its just a beautiful doll in general.