Let's go extreme:
Everybody dies except for two situations:
20 year olds only Earth.
2 months old only Earth.
I'd choose the 2 months old only Earth. There'd be more death?
Likely. Would some survive? Likely. What would come out of it?
No idea. *That's* what makes it more valuable to me.
With the 20 years old only Earth, it's pretty predictable what
would happen. Variations of what we already know.
Mind you, I wouldn't exist. I would never find out. I'd be dead.
That's ok. I'd still choose it, were it my last push of a
button.