When you restore Hyper-V, you can change UUID (or stay).
When you restore Vmware VM, UUID (BIOS uuid) stay the same, without any annotation, and MoREF changed. In some restore case I need to change UUID (BIOS uuid) (or stay), e.q. when i work with NBU proxy server and snapshots, and with some other software, that look on UUID
Well, of course I can change UUID after VM restore - but I can't find notes about UUID/MoREF stay/changed in documenatation too.