Having just gone and checked all these out. I come home and find that I can buy Mahle brand (volvo OE) filters online for about $5 each... Given those options, vs the $5 OE filter I'm leaning towards ordering about a half dozen OE filters.
Of the bunch from the pictures above. The Fram is very interesting. Both are "CH8712." However, the one with the orange plastic end caps and RUBBER seals on both ends, is priced less and found only at Autozone (I confirmed this type at 2 autozones). The CH8712 at advance auto looks more like the carquest and mobil filters, with thinner end caps and a sort of "felt" like seal. The mann filter uses cardboard end-caps.
The microguard and wix filters (same mold, different materials) stand out as very different from the crowd, as they appear to use a different strategy for producing a seal. Oddly, in the picture, it almost looks like there is an o-ring on the inside lip of the holes on the ends, but in person I did not observe this. I think it's just a trick of the lighting. In person it seemed like there was nothing in place there to produce a seal.
