I am speaking from own experience as I had Surface pro and Thinkpad Yoga. (Thinkpad is the key) Other "consumer" grade yogas are not built this way.

Advantages of Yoga:
More ports. Integrated keyboard, that flips 360 degrees to make it as a tablet. Keyboard also acts as a stand, a pretty sturdy one too. User replaceable parts (hard drive) (Surface is extremely hard to take apart). Parts are abundant and not expensive. Feels like a solid computer, not just a tablet. Light, portable. Metal / carbon body, built very well. Surface is more noisy. If fan goes bad (common problem) you are stuck with paying for repairs more than used unit is worth.
And much more smile