Would it be better to be in a group or alone 2 weeks into a zombie apocalypse?

A group of people that you get along with but aren't emotionally attached to (as in if they were bitten you wouldn't think twice about shooting them in the head) but would still trust each other enough to get each other out of tricky situations. Also in a group people would have lots of different skills that would mean that as a group you would be a lot more likely to survive. If it was world wide and there was no safe zone then you don't have much chance....