Originally Posted By: OneEyeJack
...A a minimum they are a thread and physical match..
This. Add similar sealing gasket dimensions. Beyond that if you're interested in getting a specific adbv type, nitrile vs silicone, and perhaps an efficiency spec, need to check the specific filter manufacturer information. OEM efficiency information is generally proprietary.
As for liability, assume you mean filter warranty. Most reputable brands are warrantied for the vehicle manufacturers recommended oci/fci. Even the quick lube jobber tier filters would have to be covered that long. That said, I'm not referring to oversizing from the spec filter here when talking warranty. That would/could likely void the filter warranty. Fram rep has said that the first thing they check on a filter claim, is for correct application.
Some filter manufacturers do have their own 'recommendations' for a specific fci max, which you should keep in mind especially if you're running extended ocis. Ideally in the aftermarket filter you would like to see similar characteristics to oem, like silicone adbv if the oem has it. But even that is not absolutely necessary for a good result, especially on ~5k mile ocis.