GAP Device Name vs Advertised Complete Local Name

Question

What is the difference between the GAP Device Name and the Complete Local Name in an advertising or scan response packet? Can the two be different? 
 We have a requirement where are product needs to us it's serial number as the name but we also want the user to be able to create a unique name for each device. Is this possible? 
 Cheers,
Darren

Petter Myhre · Accepted Answer

From CSS v7: 
 
 The Local Name data type shall be the
same as, or a shortened version of,
the local name assigned to the device.
The Local Name data type value
indicates if the name is complete or
shortened. If the name is shortened,
the complete name can be read using
the remote name request procedure over
BR/EDR or by reading the device name
characteristic after the connection
has been established using GATT. 
 
 So the local name shall be the same as the name in the device name characteristic.