I have read on here many times that Wix and Napa Gold are the same exact filter with different labels on them. I just took a look at both sites and the flow ratings on the filter I need was different. The Napa Gold said 7-9gpm, the Wix said 9-11gpm. Is this just a typo or could the medias/internals be different? Anyone else notice this before? I actually just ordered a bunch of Napa Golds from fleetfilter.com for the first time because the Wix's I used to get went up a large amount in price from filter1.com, so i decided on the Napa Golds instead, but now I am not so sure after seeing the different specs between the two. thanks for the help.