Honestly, I for one believe those are flaws.
To be a „new style” of SteelBook, I believe that (firstly) Scanavo wold had bragged about it before making it on an actual product, and secondly, would be somewhat „similar”/„symmetric” on both sides, and both examples (front and back, or at least on each examples would be the same), but to me, from what I can discerned from the pictures sent, I see they are different (each one have different flaw, and each side of each of your piece, is different from any other ones).