I have two the same bags, different colors and the hologram placement is different?
The hologram sticker on my relatively new white GST is on a little leather tab inside and the hologram sticker on my beige GST - bought at the same time, does not have a leather tab, but it is on adhered on the inside of the bag
I have noticed, but may not always be the case, that when the hologram is on a leather tab, the interior is fabric. If it is adhered to the bag, the interior is leather. Again, this is not always true, but I have noticed this on the majority of bags I have seen.