What is safer and the best option for me a BBL or Sculptra butt lift? (Photos)

Sculptra can be effective for filling small surface irregularities or volume deficits, but it should not be expected to produce significant buttock augmentations.  Butt implants and BBL continue to be the most effective routes for gluteal augmentation.    It should also be pointed out that Sculptra injection has no inherent safety benefit over the injection of fat, and both should be injected superficially and with larger, blunt cannulae to avoid intravascular injection.

Hello dear!
Thanks for the question and provided information as well.
Based on your pictures, you are a great candidate for liposuction with BBL, and I think you'll get very good results.
Liposuction allows your plastic surgeon to transform your entire shape. You can improve your abdomen, back and flanks, and of course your buttock, to give you a nice heart shape.
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 33 or less.
l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)