nexus 5 or lg g2?

hi am thinking of getting eithe r lg g2 or nexus 5. if someone has both can you help with few questions on decide wich to get..
so far i know hardware is the same except camera , maybe battery..
i know camera on g2 is better but how better is it then the nexus 5? are there any mods for better camera on n5
also nexus means updates...
so am in the middle of good camera vs new updates.?
i know theres aosp and cm...
about battery life how is it?
thanks