Well, for example, there are two Honda thread filters that are identical. One will have the 8-12 bypass ..the other just 8. No variance to it. I think it's for an Acura. No other apparent distinction. So while some may "meet or exceed" ..some, for whatever compelling reason "meet"
Very good explanation. So some oil filters meet generic OEM specs, and others meet individual manufacture's specs. Life can certainly get complicated for the average Joe.