And the givi ones look like the bmw ones, they all copy each other, after all there just an aluminium box
True.
However, there are differences. Not saying good or bad, but different.
The BMW boxes have the slanted corners welded, where as most others just bend a plate and slide on plastic corners. The welding makes the box more sturdy.
Around the edges of the opening the BMW boxes have a very tiny lip that does not narrows the opening. This makes it easy to slide the innerbag in/out of the box.
The OEM key is already mentioned.
The BMW top-box is rather small. You will understand why once you have tried a bigger one. At higher speeds the larger box will make the bike wobble. (That said, my Givi 58L starts the wobbeling when exceeding 190km/h, so a rather academic problem to most riders).
Personally I use both. I use the 58L Givi when I bring the boss along. In addition to the extra room the Givi box is mounted further back, providing more room for the pillion (and bringing the CG further back)
Anyway, I deliberately use the word different rather then worse/better. It all depends on how you use the box.
By pointing out the differences we may make our choice based on ambitions and needs.
I think the graphics improved the looks
