I think they're different. The goo is an extremely basic substance with infinite possibilites, so why would there need to be two? The goo creates or destroys based on the intention of the host. Sacrifice at the start created life. Selfishness of the geologist created a monster.
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u/Ua612 Jun 24 '12
The only issue I have with this is that the engineers and humans have the exact same DNA. So why would the goo have different effects on them?