http://www.decodethis.com/
Unfortunately, there is no vin decoder out there that will tell you if a CX-9 is a Sport, Touring or GT (Grand Touring) unless you call the dealer, talk to the parts department and give them the vin, then they should be able to tell you.
For a guide, here is the most useful info for you:
Sport: Cloth seats, halogen headlights, no foglights, 18" wheels
Touring: Leather seats, halogen headlights, no foglights, 18" wheels
Grand Touring: Leather seats, xenon headlights, foglights, 20" wheels.
There are other small differences, but these are the ones that stick out like a sore thumb. Alot of times CX-9's will be listed improperly online, with the wrong trim level listed, but all you have to do is look at the pictures and the pictures will tell you which trim level it has.
Good luck!