Hi,
not exactly an expert .....but some minor differences are which have been explained to me are -:
This trailer has three `hood` bows for the trailer cover to stretch across (normally a vinyl cover) the bows are slotted in to brackets welded to jeep sides (internally),
The rear lights are fixed to the bottom of trailer body, mine have been raised and they can be 6, 12 or 24 volt
The rear panel should not have two areas (read depressions) on it,
The Axel should be round, on mine is square (as in box section).
I believe the suspension units are vertical as opposed to being at 45% from the Axel to the body,
The French ones have a shorter towing eye ?,
These are very basic differences for the French trailers them selves were modified/ changed over the years to include the correct number of vertical depressions on the sides.
Also not evident in the photos the wheel hubs have maker name stamped on the (also seen on rear of trailer)
I know there are more, others feel free to to add / correct above info
Ashley