Many already know Saab cut a deal with Subaru to use their WRX platform for a test market which Saab dropped a year into. The 9-2X was literally a luxury re-branded version of the regular plastic WRX. That's it.
So if you are in the market for the ever-popular WRX, why not look for the super-rare Saab version. All performance modifications carry over without any problems. If you can find one, consider yourself gifted.