School Me On Distributor Performance

Don't you just hate it when every bit of new information creates more questions than it answers? I didn't realize that the hex on the OUTSIDE indicated adjustability, so I need to order a new pod. I started searching the web for a breakdown in available vacuum advances, since most manufacturers don't. I did find a paper, written by a guy called Lars. Lars is popular in the C3 Corvette forum I'm also a part of, he is apparently a whiz with Quadrajets. Here is his information, unfortunately it only applies to GMs...
https://www.crankshaftcoalition.com/wiki/images/e/e4/Vacuum_Advance_Specs.pdf

So I went to the Summit site, and started reading numbers off the pod arms by blowing up the pictures. I've found two canisters with the most built in advance (9.5), whose arms match the shape of the cannister I currently have.
DODGE Standard Motor Products VC167 Standard Motor Vacuum Advance Canisters | Summit Racing
DODGE Standard Motor Products VC-168 Standard Motor Vacuum Advance Canisters | Summit Racing

Since they are shaped the same, with the same advance, I assume the only difference is the vacuum at which they operate. On has AG6 printed on the housing, the other AG11. Is this referring to the vacuum that it starts adding timing?