If we found life on Mars, or Titan, or Europa, (or anywhere) this would be my (basic) questions:
Does the organism have a DNA (similar) structure?
Yes
Does the DNA have common genes with Earth's life tree?
Yes - then I suspect panspermia
No - then this adds evidence that DNA may be a common form in the universe for genetic information transfer
No
Wholly Krap! This opens up the ball game of life wide open!