This has been posted many times on here.
They haven’t updated their boxes.
Check if 2 of your rails are marked Lead 08mm and 3 Lead 20mm.
Then you have the new one.
As far as the box goes, it’s a heavy item and shippers are really bad but the SM is really well packed. Mine was pretty beat up.
Now if the stuff looks used and has sawdust or ash from laser, then that’s a different story. It will be obvious if the 3d head has been used.
-S