Read the entire full detailed condition descriptions of each (not shown here), and I think it is clear the older one was in better condition, so of course it sold for "more" (which it only did with your inflation adjustment).
I always give hugely detailed condition descriptions on posters like these (just as I did on both of these years apart), and I am always 100% honest in what I write, both so there is no chance of a return, and so I can sleep well at night.