I would pull that lever and divert the train/trolley, in the first scenario, because I would be sparing 5 lives and sacrificing one, and also sparing countless others - all those relatives and loved ones of the 5 saved - from all the grief and heartache of their losses, whilst limiting such grief to just one poor family.
In the second scenario, I would push the fat guy in front of the train, because I would be saving 6 lives and many more others the grief and heartache of bereavement, whilst limiting the loss of life to just one, and the grief of the bereaved to just one family.
AND - in my opinion - the bastard is the one who tied all those poor feckers to the tracks anyway, and he was 'hanging around' on the bridge for a good view to watch the results of his handiwork. :laugh: