Balanced Power BP-3.5 Sig. vs. Hydra 8

Has anyone made a direct comparison between the Balanced Power BP-3.5 Signature (with or without upgrades) and the new Hydra 8? If you have, I'd love to hear what you think.

I'm expecting my BP 3.5 to be here next week. I think this has been compared before on some of the older threads.