Canon 5D Mark III and GoPro Hero4

[Hank E]

I'll be shooting a short film soon. I'll be using a 5D Mrk III for most of the video and a GoPro Hero 4 for some wide angle POV shots as well.

My question is; Should I try to use the same Screen Resolution in both cameras? Or, as long as they are both 16 x 9 it's not really going to matter?

Thanks in advance for your help!