Much discussion in mod suspension forum on this topic. Here's a long one:

http://www.contour.org/forums/ultimatebb.php?ubb=get_topic;f=46;t=000256


98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both