ROM revisions numbers/letters, and what they mean:

ROM revisions numbers/letters, and what they mean:
* What does "rev" mean? https://old.reddit.com/r/Roms/comments/w7ldgu/what_does_rev_mean/
* What Does "REV-A" means on a NES Cartridge? https://old.reddit.com/r/gamecollecting/comments/8aiczc/what_does_reva_means_on_a_nes_cartridge/
* So what's the deal with "rev a"? - NES: https://gamefaqs.gamespot.com/boards/916386-nes/78234885
* In-game differences when having "Rev 1" in the ROM's name? https://old.reddit.com/r/nes/comments/uci703/ingame_differences_when_having_rev_1_in_the_roms/
* Difference between "Rev A" and "Rev 1" for NES games? - No-Intro: https://forum.no-intro.org/viewtopic.php?t=1907