>>76394770 (OP)Bone structure, fat distribution, and insertion points are what make the biggest differences in the overall look of the ass. But if you isolate training the glutes and keep quad/hamstring training on the lower end, your glutes will appear bigger in comparison (see pic comparing different athletes' training styles)
Think lifts like:
-Glute dominant Bulgarian split squats (longer stride)
-Cable kickbacks (see https://www.youtube.com/watch?v=f3a6nRdMNjM for form)
-Hip thrusts (ideally on a Smith machine or an actual dedicated hip thrust machine)
-Glute dominant back extensions (keeping back rounded and/or exercise bands)