Lovin' my RIP. The 135mm rear is enough for my riding capabilities, it's awesome set up 2x10 and probably be perfect with a dropper seatpost (my next purchase). With a TALAS fork and a RP23 shock the RIP is a great chassis for all day, all mountain rides.
Have you test ridden both?
If you could dig deeper in the wallet, the RIP RDO, Ibis Ripley or Pivot 429 would be mo betta!