After looking at one of my art books, which seemed to show that half the width of the female shoulder was approximately the size of the female head, I decided to see exactly how wide the shoulders of these two models were by using their heads as reference points. As you can see, Posette's head is looks approximately 10-20% longer than half the width of her shoulder. If you therefore want to approximate that look in Victoria, I suggest you reduce the x scale of the collars by about 10%. This will make her trapezius look large, however, in which case you can apply the morphs I posted to compensate for this.