Tough one.. battery life wise the Plus gives awesome longevity where my 5S lasted 6 hrs before needing charge.. my 6S Plus is only down to 60-70% with my insane usage (streaming music, podcast, synch, chatting, occasional hotspot, moves the battery vampire app etc) . The large screen is also decent for video watching and handling documents on the go.. where it will hurt is form factor being large and weight.
I'd say find someone with a 6S and a 6S Plus, put in your pocket walk up and down, use apps on the screen and see how it is.
I'd say find someone with a 6S and a 6S Plus, put in your pocket walk up and down, use apps on the screen and see how it is.

