In addition to the packaging differences (look for the addition of some non-English verbiage on the back), for about half the cases, the MagSafe animation doesn't show on the phone when you put on the case.I ordered a black iPhone 16 Pro Silicone case. What have you noticed different with your non-official case(s) from Woot, other than the packaging?
I'm skeptical that they'd be knockoffs, but we'll see after I get the case. I'd guess that the part of the case that works with Camera Control would be most likely to not work as well if it weren't an official case.