K&N oil filters are made by Champion Laboratories, makers of Champ, Lee, Mobil 1, Bosch Premium, STP, SuperTech, Luberfiner, and maybe other brands. The K&N labeled oil filters have average filtration and high flow rates suitable for modified engines with high flow oil pumps. These filters are OK, but for a stock engine, probably not worth the extra cost.
Best?...who knows. You'll get several hundred thousand of miles out of these engines with OEM filters, and probably just about as many miles with cheapo Frams. I like OEM, Baldwin/Hastings, WIX/NAPA-Gold, ACDelco, Bosch Premium and Purolator. I use OEM filters on my family's vehicles.
Ken