Which button would you press and why??

I would press the grey button because you can do the same as the blue button in more comfort. For example I could sit on a couch and lift the couch and fly to wherever I want, I could lie in my bed and fly around the world in one night. If I was being attacked I could force the attackers hand to turn around their gun or sword on themselves. I could send supplies to people in Africa from my bedroom. I could lift the tallest building and move it to my garden. I could stop any bullet, missile, whatever from hitting some where!