Should I use Sky OS or Chrome OS?

I had recently been looking for a new operating system, and to try them out, i would dual boot them (stupid, I realize now), but when I decided that i wanted windows, i tried to add my two drive partitions together, and forgot that it would erase all my data. Now I don't have windows or any way to access it, so I decided freeware OS would be the way to go. After research, I decided to narrow it down to either Sky OS or Chrome OS. I would like to know who has tried either and what they have to say about the pros and cons of them