It's interesting to note that, regardless of actual origin of life, a significant exchange might have been occurring (or is still occurring) between Solar System bodies (judging by how we found a number of Martian meteorites on Earth). So if we find life elsewhere in the Solar System, it might be quite compatible.

The idea is mentioned in Kim Stanley Robinson's "2312", where simple organisms exist in Enceladus's ocean, and some people inject them for fun (with neutral or mildly beneficial effects).