Yep...those are pretty much the differences.
We just added a third Subaru to the family Saturday--a 2002 OBS. Very nice. So nice, that I'm jealous, even with my '01 RS. The car just seems more solid and build quality seems better.
I'd say that the OBS is worth every penny. Although I'd go for the TS and get foglights later. I like the monotone paint scheme and the fact that its available in blue.
You can always add stuff to the TS, but the bottom line is how much you want to spend.