New Hydra 8

Would like to hear from anyone who owns or heard the new Hydra 8. Hows the sound? What improvments do you hear?
Has anyone compared it to the original Hydra?
I can't really give an honest opinion sinse I made other changes at the same time. However I'm really impressed. I noticed you already have the '8' with an Elrod sig. 3. Did the sig 3 make any differebce over the supplied diamond back?