I'm very curious about this too. I've owned my classic box for about a month. It's definitely not liege or spazzolato calf; the leather looks just the same as the bag in your picture. But it seems REALLY resilient. I've been carrying it every day, not babying it at all (accidentally bashed it into things quite a few times), and it's completely scratch free. I've got quite long, pointed nails too, for the record!
I'd wondered if it was perhaps a slightly different leather, because I keep reading about how box calf is so easily scratched. The tag simply says "calf".
Do you have the code? Can you post it here? This sounds really interesting!! Maybe they finally come up with a box leather that's more resilient?!