You can compare it to the prime but who really knows when the prime will come out. Yeah, its "supposed" to be in october, but the bionic was also "supposed" to be out in Q1 of this year, and then every month it was delayed further. I guess if you dont need the phone right now and can wait, check out what's out when you're in the market for one.
For me, I wanted a dual core 4G phone, and the bionic fits that, plus i was also forced into a new phone asap, since my D2 crapped out last week and the no longer sensed anything on the touch screen.