Here’s a side by side pic of the Prairie Grove chestnuts with some Italian ones from a grocery store ($8/lb, but I cherry-picked the biggest). Both are good. I’d say the Italian ones have a bit milder of a flavor.
I did end up ordering trees from Perfect Circle. 1 large grafted one of Fisher T1 (not sure what the T1 stands for) and 2 each of the RR and Stehli Qing seedlings. Whichever is smallest will get potted up for later, with the other 4 being planted.