Based on my observations, when I do Bulgarian split squats, they hit the glutes really nicely. In fact, even if I do the Bulgarian squat without doing regular squats, my glutes are very sore the next day. My regular squats are deep (butt to the ground), but if I do regular squats alone in a workout, the next day my glutes aren't sore. I use the same weight for both type, except for the Bulgarian split squats I use a smith machine (so that my shoulders doesn't fatigue as quickly) while for the normal squats I use a barbell in a squat rack.
Does this make it a better choice if a person wants to build the glutes?