yes - it's interesting how we all lose differently and are different weights in the same sizes - bodies are like snowflakes!
my biggest problem right now is my boobs - they hang so lowly that the empire waist tops that I love don't fit right. I never thought I would consider plastics but seriously, they are deflated balloons that are pointing straight down now - very pitiful!
It's the cut of the clothing. Overall chest, waist, hips measurements may be the same/similar but the arm syce and crotch and often the neckline are cut bigger/longer. HOWEVER, manufaturers do not share a common sizing format, so don't worry about sizes so much as FIT. Fit is critical,hang the sizes. I have everything from an 8 to a 16 in my closet and it all fits.