It depends on your idea of better, a clean fresh standard air filter is easily as good as a performance filter. Where the performance variety excel is thier consistancy over a longer period, plus with cleaning and oiling will easily exceed the life span of a standard air filter. A genuine oe filter can easily be £20+, a k&n soon pays for itself.
I have little knowledge on performance oil filters. Can only assume they are freer flowing elements, hopefully not at the expence of filtering efficency.
Ade
