27.5" vs 29" Mullet Wheel Setup... Which is Best?

Last year we made a video testing the basic 29 inch wheelset vs 27 wheelset where I concluded that for enduro and mtb racing, 29 is best and for fun 27 was the one to buy, but since then I've wanted to try the setup known as the mullet, with the smaller 27 inch wheel on the rear and 29 on the front. The theory being the grip on the front and the agility of the smaller wheel on the rear creating the best of both worlds. Let's find out! Enjoy my thoughts on the great mountain bike wheel debate!