APEXi does filter better than K&N... It's a paper filter.. It can also flow better, but due to the NA application and having the AFM in the way, I doubt you would notice. K&N is better bang for the buck for sure.
BUT for those that want an APEXi filter, there is now an option.
my old K&N was tore up so i opted to get this one...its kinda small vs some of the other filters out there...im not sure if size makes a difference in this case ...i just got it, so i dont know how quick ill need to replace it.