Thanks, I had been using "feel" to discern the two. There was a small piece of painter's tape in one but no markings on the tape so I wasn't sure if that was supposed to mean something or not.
That aside, I carried a P30 mag in the one that I believe is for metal mags earlier today. Very comfortable and concealable, so I'm satisified. Would definitely pick one up for the Shield/G43 if you ever made one too - I don't always care spares for my double stacks, but never leave the house without a spare Shield mag.