Who gives a **** what kind of filter it is. Buy the cheapest one there is. The consequence is nothing compared to any engine fuel or transmission filter quality and destroying an engine or transmission. We are talking about cabin air here. Filtering anything is better than nothing. If you atre worried about catching lung cancer or something you are better off wearing a respirator.
I used my $20 autozone rewards and bought a stp filter and a can of ac system deodorizer. So basically this was a free upgrade.
