Seems a bit odd to me that a GTX1060 is beat by a GTX970, but that might be because of the mobile vs desktop version? , l am pretty sure l have ran other tests posted on this website showign a GTX1060 exceeding a GTX970
Here are surprising results generated from the new Blender Benchmark under its Blender Open data website program.
Quick summary/my findings:
less render time running Linux [LinumMint] than under Windows 10 [all things turned off], same hardware
Linux run: Workstation with GTX1080 8Gb, GTX970 4Gb, 32Gb RAM, Quad core Intel processor. No SSD
Same hardware as above but run under Windows 10
Ran on same hardware, only using the GTX1080 8Gb , under Linuxmint – impressive resuly showing in my view and from cuda/nvidia research l did that the 4Gb of the 2nd graphics card limits the performance.