For motovlogging the Drift is hands down the best option and the easiest to use. I own all 3 and the drift is the best all around for vlogging. My recommendation is to go with Drift if you are wanting it solely for motovlogging. If you want something to also use for cinematic stuff on the occasion then go for Sony (all models from the as20 and up are great) it shoots great quality and is much cheaper than GoPro. I am not knocking GoPro either though since they are great as well but make sure the money you spend is worth its value in the amount of use you will get out of it.
GoPro (I have Hero 4 Black):
Pro: Quality, Frame Rate, Superview Option
Cons: Only good for Chin Mount side mount is bulky to me, Battery life sucks, more moving parts to deal with.
Drift (I have HD Ghost):
Pro: Easy of Use just click on and go, no mic adapter, quality, lens turns, vivid mode, aerodynamic, people don't notice it's a cam, cheaper
Cons: no superview
Sony Action Cam (I have as100v):
Pro: Quality, Frame rates, Features/ options, Image Stabilization
Cons: mount options, 
Hope this helps out.