Difference between Legacy GT/GTB?

Hi can anyone tell me wot the difference is between a Subaru Legacy GT and a GTB????

I can only go on 97 as thats what I have (GTB), GTB has the following extras over the GT

- Bilstein sports suspension (= awesomw handling!)
- GTB spec unique 17" alloys
- Sports style seats ( sort of in between GT and WRX )
- Allot have a sweued seat covering
- slightly lower ride height
- lower bumper spots and turning lights ( orthough some of the 250T's
have these also
- Rear spoiler on wagon? ( Mine has it but I dont know if this is an option
or standard on the GTB

thats all I can think of really

cheers