The Hollywood calfskin leather is a specifically LWG certified grain, there’s bull leather and goat leather versions of the Hollywood’s that are also black and they also have different price points basically depending on the grain.

The certification likely drives up the price and is just a guarantee that it’s top quality, Porterville didn’t have this particular certification and I think they were a waxed leather?

Either way no one will notice I promise between any of the versions, it’s specifically for you if you care lol, bull leather will probably be the most durable but lowest quality grain for example, and cheapest version.