I've heard opinions in the past that "all vehicle filters are made by only a few factories, than branded' and that "they're all pretty much the same quality"
well, we've done a small experiment with a friend of mine.
We took 2 filters of 2 different brands(never mind which ones)
Both are for the same vehicle, supposedly same specs.
Difference in retail price of the filters was about $5
What's not quite visible in the picture is that the white paper element of the filter on the right is hexagon shaped, not round.
The one on the left is round.
Here's a visual result:
As Sat would say "Discuss"