Windows 8 and 8.1 have the option to " Off" , but actually , you're not turning off the PC , but hibernating !
That's why he comes back so fast .
Here is my conclusive proof : retest with the most current version of the two systems , but instead of switching them between the desktops systems and resumes both at the same time , select the time for which off and return to the desktop first, and so will see which is faster !
Up because Linux , if Ubuntu is lighter because it uses less hardware , as can be boot slower ?
* Note : I use notebook , every time I return from hibernation on my Windows 7 appears when I call : Resume fron hibernation . And the same happened when turned off and connected my old Windows 8 and 8.1 , I've used them!
I hope to have informed you well , as you eluded to misleading Microsoft , who implemented it to say that their system was the most today !