Gold Duster vin codes A64 vs A94

What is the difference (besides the numbers) between the A64 and A94 vin codes for the Gold Duster? I have the window sticker for my original 1973 Gold Duster, which I bought when I got my first job after college, and its special package code was A94. I recently bought another 1973 to have resto-modded as a retirement present to myself and its fender tag was an A64. The Mopar decode guide shows both are Gold Duster packages. Both cars are/were VL29C3B******

any thoughts?

Dennis