Difference between RIP Alpha and RIP Phenom

I'm looking for anyone who has tried these two shafts, I'm currently playing the RIP alpha in my 910 and it has been a great shaft! Wondering if I should consider the phenom and would love some reviews/feedback, thanks!

I am wondering the same thing.  I have the RIP 60s, and would love to try the Phenom.  Anybody have any experience with this shaft?