I just installed a new EP Auto filter this afternoon. Absolutely the highest apparent quality (fit and finish) of any cabin filter I have ever installed. Including OEM. I ordered three more when I got into the house after installing it. That ought to do me for a while.
I recently replaced my ES350 Lexus and I noticed the expensive filters have support structure between the folds which keeps the folds straight. The recent filter bought off Amazon from a dealer didn't have the structure. I think the important things to look for is the number of folds which equates to surface area and flow ability. .