It's not quite as simple as that.
Those with Lipodemia often look larger rhen they are.
Genetics, how long the weight gain has been going on for, age etc all.play the differences.
Case in point, Lacey Hodder and Dominique Lanoise, both fucking huge at nearly 700lbs
Lacey could get into a shower and drive a car Dominique was bed bound.
Dominique has gargantuan tits, Lacey doesn't.
Amber Rachidi was about 30 lbs lighter then those two, and has gigantic legs.
I have no doubt that Reenaye is using some artistic license here, but the point you made is false.