The paper filters are generally all the same and perform the same. The K&N oil soaked filter allows greater air flow, but also higher potential for tiny bits of dust and similar to pass through. (There is always a compromise when trying to get more air flow.) I have a K&N filter that I only used for a two month period and then sold the bike, installed a paper filter and kept the K&N filter plus the full cleaning and oiling kit. It is available if you are interested?