The clone\target\destination dive will only boot "by it's self" when
physically (electrically) placed as the Original\Source. (Unless both
the MBR and NTLDR are modified on the clone.)
The xxclone "Test Boot" is a comfort item to allow booting the clone
"via" the Source (the boot starts on the original and is passed to the
clone via the boot.ini), with both drives still in their "as cloned"
positions. (And just in case... Windows won't boot a USB drive.)
The difference between a Copy and a Clone (defined here as a Bootable
Copy) is, the Drive Letter and Volume Label Assignments of the Source
and Destination are Swapped in the Registry of the Destination. Making
the destination the Windows Installed to Drive when it boots. Windows
(and other software) uses the VolumeID (Disk Signature) as a form of
copy protection. Making it a good idea to duplicate the VolumID of the
Source onto the Destination. This data may be seen in the registry at
HKLM\System\MountedDevices\. The destination data may be seen by
Loading the System file (Hive) from there as a False (nonexistant) Key
into the running registry (completly safe), where it can be Edited and
Unloaded back to where it came from. And in fact this is what xxclone
has to do to make the destination bootable.
DES