Paskal – I think you are wrong and I’m fairly certain that you won’t find that evidence because it doesn’t exist.
How much did Victorian Londoners and Victorian New Yorkers differ in their appearance ? If someone showed you a group photo, could you tell where that group was from ? I think not. Why then would you assume it was different in Early Medieval times when nationality was less of an issue that personal and family loyalties and identity wasn’t the ‘clone’ concept that came with nation states.