What is the difference between the various floor mats?

Saab 9-3 (9440) Model Year 2003-2012

1. The convertible has wider sills than the sedan/wagon cars.

Example: The sedan/wagon mat can be used in a convertible, but it is to wide and will go up on the sides. It is just a cosmetic issue.

2. Model years 2008-2012 have other locking than previous model years 2003-2007. The locking is not compatible. A wrong type of mat will still be in place and not move around to much even though it is not locked.