$11's to the $22

I am thinking of jumping from the 11's to the 22's and I was just wondering what I should look for. I played 3 22 dollar tournaments a while ago with my best finish being 3rd and they seem a good bit tougher than the 11's. Does the same strategy of super tight early, pushbot late apply to these as well? Are there a lot of fish in the 22's? How much harder are they than the 11's on average. Any insight helps thanks.