I would have thought that this is magnitudes easier, because (with exception of my last sentence) this uses existing technology (although, AFAIK the artificial ecosystems we tried to create on earth failed after some time, so maybe there is a bit more fine-tuning needed). Whereas we still seem to be far away to understand humans or upload them to computers. But in the end, perhaps we would not want to colonise space with a rocket like structure, but with the lightest stuff we can possibly built do to relativistic mass increase. Who knows. The lightweight argument would certainly work in favour of the upload to computer solution.
I would have thought that this is magnitudes easier, because (with exception of my last sentence) this uses existing technology (although, AFAIK the artificial ecosystems we tried to create on earth failed after some time, so maybe there is a bit more fine-tuning needed). Whereas we still seem to be far away to understand humans or upload them to computers. But in the end, perhaps we would not want to colonise space with a rocket like structure, but with the lightest stuff we can possibly built do to relativistic mass increase. Who knows. The lightweight argument would certainly work in favour of the upload to computer solution.