The differences are many. BFG prices are always much higher than any other brands. For instance, you can get an overclocked vanilla 6800 from eVGA for just over $100.
In the past, BFG could demand a much higher price because they were known to offer the best service among video card manufacturers. They do have a solid product line. I used to be a believer in BFG until recent market changes, and I had BFG cards.
However, manufacturers such as XFX and especially eVGA have quickly caught up to BFG on the service side. And their prices are much less.
The 7600GT is a much, much more powerful card compared to the 6800 (even the BFG OC version). You're pretty much talking night and day there. The 6800 is quite a dated GPU at this time, whereas the 7600GT came out only in late January.
Since your budget is $250, if you can do it, I strongly encourage you to return the BFG. You will take a 15% restocking hit ($40) but with the $210 you can go in for a 7600GT and still come out money and performance ahead.
It's sort of shameful that BFG is still pricing their 6800 OC at that price. They have been competitive with more recent and better cards such as the 6800GS and the 7600GT.
firefighter@graffiti.net