I was having trouble booting from the EFI volume on my new installation. I could boot from the USB stick into macOS, but not from the EFI volume on the internal drive. I read that others copied the EFI folder from the stick to the internal drive and solved the problem. I compared the two folders and the difference I found is that MultiBeast does not put a copy of apfs.efi into the drivers64 folder, but only puts it in drivers64UEFI. Why UniBeast does puts apfs.efi in both folders and MultiBeast does not, I don't know. Seems like a bug to me. I used the latest versions of both beasts.