And so to answer some of your questions. The Hades weighs in at 2lb 9.9oz. The B3 weighs in at 2lb 8.9oz. The spine peak on the B3 is roughly half an inch further away from the toe than the Hades. The middle according to where I hit the ball is large enough to be roughly the same on both, although I'd say that the SAF's is slightly lower.
They both pick up really well, although the B3 is marginally better, due to weight distribution and of course lower dead weight.
The SAF toe is way better than the B3, which has one of the worst toes on any bat I have used, as any ball hitting the bottom inch or so causes one to drop the bat due to the pain of the vibration.
The reality, though, is that both pick up very, very well, and you couldn't describe the SAF as being bottom heavy. Both have very good, long middles, however, the SAF middle extends slightly lower than the B3.