Well I can argue with that because Linux systems usually consume more energy than identical systems with other operating systems though they are probably less green due to having a lot of cloud and ad related tech built in.
That's not ture atleast on my system, I played modded Minecraft for 4 hours on performance mode and I still have 15% to spare, I also watch BCS for an season and it's only drain 60% on power saving mode
I used win10 1 years and I don't remember exactly what the power consumption is like but I think it probably worse because of win10 use more on CPU and RAM for anti-malware and telemetry
Yes, at least on battery powered PCs. Other kinds of machines may be more efficient on Linux but I guess these are mostly cases when there are no big and well developed proprietary solutions for them.
I was talking about comparing the efficiency between operating systems. That requires the use case to be the same. Comparing different use cases is unfair.