Are you a Shimano or a SRAM person?
Your choice of two bikes. The bikes are identical in every way EXCEPT the groupset. One comes with SRAM, the other Shimano. What's your pick and why?
For me, I'd go for Shimano only because it's what I've always been riding with. Every bike I've ever owned has had Shimano components. It's what I know and what I'm comfortable with.