>>54198778The DS carts all have a specific industry standard printing method to the labels. This causes the weird little gray box of the DS logo to be made of dots at about a 30° tilt, what the arrows are pointing to.
Pretty much every reproduction uses an inkjet print that isn't quite as sharp to make out those same details, and instead uses the 3DS style square that's at 45°. There are a very small handful of real DS games with the 3DS style square though, notably B2W2 (but not BW)