I noticed the Wix and Fram version's of a Purolator are smaller in size. Does size matter? Wix is supposed to be a much better filter. I have noticed Purolator's filters generally run a little larger in size.
I've used Wix filters and the Pure One filters. I liked the Pure One filters better, except that vomit color they paint them. I personally like to go with the bigger filter when ever its possible.