No. You exhibit a severe misunderstanding of evolution.

Imagine panspermia is true. Some kind of life exists in space. and some of it fell down to earth. Then life on earth would evolve down here, adapting to the particular circumstances of our planet, and the species in space would evolve, separately, to adapt to living in space. The result is that both strands would inevitably become very different.

If you brought down life from space, compared it to actual life on earth, and found they turned out to be the same, then necessarily it would mean that both strands, in completely different environments, evolved to become the same. This is not only improbable, but emphatically impossible.