I just purchased a SuperTech ST3674 and a Bosch Premium 3423 for my '01 GMC Sierra 4X4 5.3L in which I am going to run Mobil 1 10w30. Both filters are totally identical. Both are in the same black can, the inlet holes are the same size and spacing, the internals look the same, both have the same printing on the end of the filter except for a part number, and both have a "G" stamped in the metal near the inlet holes. There are NO visible differences of these filters. I will be using these filters so I won't be cutting them apart. One question. Are these filters know to have the same filter media? They are both a blend of natural and synthetic materials. How do these compare to the Wix filters?