I haven't done this myself, but I understand the result should be the same as the SupportAssist OS Recovery "cloud restore" option, which I have tried. It should essentially restore your system to factory state, including Windows, all necessary drivers, and both Dell and Microsoft recovery partitions.
I'm going to have to replace my HD and created a DELLRESTORE usb using SupportAssist OS Recovery. Other than Windows OS, what else does SupportAssist OS Recovery install? Does it create the same EFI and Dell Diagnostic partitions that existed on my existing HD?   Thanks for your assistance.
What Support Assist Restores other than OS