Used both. I am no mac fanboy, but the yoga 2 pro does not even compare to the macbook retina, IMO. Yoga 2 pro feels cheap in comparison through and through. Keyboard & trackpad are TERRIBLE compared to rMBP. Hinge feels cheap and easily wobbles. Yoga 2 pro gets about 5.5-6 hours of battery life on light usage, the 13'' macbook retina gets about 10 hours on light usage. Yea, the yoga has "tablet" mode... but I found myself never using it, it was just too big and impractical, for me at least. The only thing that the yoga compares to the retina in is the displays, however, I still think that the retina has better calibration (out of the box) than the yoga 2 pro.
The Yoga 2 Pro is an okay machine, but just cannot compare to the macbook retina - and scores lower in every category (other than possibly the displays) that I can think of, when matched up to the newest 13'' retina.