[Chen]

I own both a Microsoft Surface Pro 5 Windows tablet and a 10 inch Lenovo Yoga Tab 3 Plus, and use mobilesheets on both for performances (in a choir and for playing the piano). 
The Android tablet is my preferred device, unless i need the larger screen (mostly for the piano). 

In my experience the Android tablet is more reliable. With the Windows tablet i experienced situations where the OS did something in the background, made noises/popups, "required an update" and behaved sometimes more temperamentfully than i liked during a concert. 

A full reboot of my Android tablet takes about 30 seconds, which may be the last resort to get back into a working state after a lockup. Windows reboot often triggers some pending installations, which makes the "time to recover" unpredictable. 

So i usually carry both devices to concerts, but use the Surface tablet only as backup. This dual-device/dual OS strategy works well for me, and having no other paper backup, relying on a single device is not an option.