And they are very different and may well have different answers.
1:Is it there? Since we know it exist one place in the universe a "no" answer seems strange (giving earth a special and unique place?)A rather weak assumption.
The second question could be:" Is all life rather "similar"(of course there may be difficulties defining basic "similatity" versus "difference" since it would be rather absurd to believe all worlds are exact copies of earth. How "similar"? Still I think most of us could imagine both a world we would agree is "basically earthlike" and one that is not.)?
None of the possible answers to the second question(basically yes or no) says anything about earth being "unique", but are different views about the nature (or perhaps laws) of life and the universe. So it may be (or not)it is all very much like at earth.