engine masters did a test on iol filters. k&n was said to stop a smaller micron particle then the rest. not sure how true it is but if true could help made a decision on buying filters.
They did a lot of oil filters. I don’t remember who came out on top or the what nots. I did some looking into this topic a while ago. I listed among the top easily bought brands.
YouTube yielded some interesting results. A few even showing the “As of late” hated brand of Fram doing really well in there filtration abilities.