Several small variants exist on the different models.

The third concerns the front and rear parts, underneath.
There is a light "relief" in the front and the rear.
They are two different types, one with this relief (first one) and the other without (last one) :

Green Eagle transporter 1 st release are with the relief.
Green Eagle transporter 2 nd release are with or without the relief.
White Eagle Freighter are only with the relief.
Blue Eagle Freighter are only without the relief.