I took a Honda(S2000), Napa and a Baldwin filter apart to see what difference(not just size) there is between the three. I use Baldwin filters on all my toys. The canister thickness of the filters were, Honda-0.028, Baldwin-0.024 and the Napa filter Napa-0.019 all three filters were well made. The gasket on the oil filters are, Honda and Napa ID 2.170 OD 2.450 the Baldwin is bigger at ID 2.455 OD 2.800.
I like to use oversize filters when I can and the big Baldwin lets me run 1 more qt. of oil in my '06 S2000 than the stock Honda filter does.
http://s949.photobucket.com/albums/ad338/rrounds/Oil%20Filters/
ROD