The reflector units are different. The major difference is in the shroud that covers the left hand (dip) H1 bulb. Its the shape of the cut-outs in that shroud that form the diagonal line between light and dark that is "up at the right" on imports and "up at the left" on UK bikes.
I think the actual silver reflector pattern is also different - but I'm not absolutely sure.
The "country of origin" mark on the bulbs is irrelevant.
Basically- if you light up the left hand H1 and it makes an obvious diagonal that is "up at the right" - you have an import module.
I'm pretty sure that the 5DM-84310-00-00 is the continental (majority) version and 5DM-84310-10-00 is the UK (minority) version but without taking my bike apart, I can't tell. My bike is French, BTW - it has an "outrageous accent"
Beware ... dealers can lie to you ... they lied to me