So then, Rawls's veil has to be modified such that you are randomly chosen to be one of a quadrillion people. In scenario A, you live a million years. In scenario B, one trillion people live for one billion years each, the rest are fertilized eggs which for some reason don't develop.
I'd still choose B over A.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.