Arguably these are different amounts of bad even before considering this: We generally consider existing preferable to non-existence to some extent when suffering isnt taken into account, consider that if you murder someone quickly and painlessly in their sleep without waking them, they dont really themselves suffer from it, but people will still find you to be a murderer, and would object to the idea that you might do it to them. In the top example, killing the people actually kills them, but in the lower example, it arguably doesnt, because the experiences of the people involved never actually cease, therefore, the lower paths seems to me to be preferable because you supposedly get equivalent amounts of “suffering”, but different amounts of time that people spend in non-existence.