AB v/s non-AB sunscreens?

I’ve been using a non-AB sunscreen (LRP) for a few months now and uhhh I’m not sure how to feel about it? It’s not like it is breaking me out but I also feel like it’s not doing much even though I wear it on the daily and re-apply if I’m out for a long day. But are sunscreens even supposed to make a big difference?

I heard that non-AB sunscreens are better than AB ones, is that actually true?

I’m relatively new to skincare and I’ve only started wearing sunscreen a few months ago lol (my goal is to treat hyperpigmentation) so I’d love to hear your views on this. Also please tell me if you have any HG AB sunscreen and why it is your HG!