Should I get Emu or Ugg Boots?

I recently bought a pair of Emu boots, but I'm thinking maybe I should return them and get a pair of Uggs instead. The price of the pair of Emus I got is very similar to that of Uggs (clic short). All I know right now is that Uggs are lighter than Emus, and the Emus I have is slightly loose at the leg. Is it like that for Uggs? What should I do? Which is better quality? Which will last longer?