Yesterday night 21:00-22:00 NZDT I let both camera timelapsing.
Canon EOS 6:
Samyang 14mm f/2.8, ISO 6400, 10sec, 2 sec interval.
Gopro:
Night lapse, ISO 800, rectilinear (slightly smaller FOV than the Samyang 14), 15 sec, 5 sec interval, BT on.
It indeed appears that the Gopro is far worse due to its small sensor but it is 'acceptable'.
http://pix.skysurfer.eu/Nightlapses%...%20EOS%206.mp4