atq - printing count - 100 vs 101
drk - printing count - 119 vs 122
rqs - card names - 54 vs 56
s00 - card names - 53 vs 20
soi - printing count - 330 vs 331
ugl - card names (count same) - 88 vs 88
unh - card names - 145 vs 173
ust - card names - 249 vs 268
wc02 - card names - 72 vs 73

m20 - mtgjson only -  "Core Set 2020" - 3 cards
ppre - mtgjson only -  "Prerelease Events" - 40 cards
prm - mtgjson only -  "Magic Online Promos" - 1248 cards
ps11 - mtgjson only -  "Salvat 2011" - 224 cards
psal - mtgjson only -  "Salvat 2005" - 725 cards
ptc - mtgjson only -  "Pro Tour Collector Set" - 307 cards
ss2 - mtgjson only -  "Signature Spellbook: Gideon" - 8 cards
sum - mtgjson only -  "Summer Magic / Edgar" - 306 cards

mtgjson 3.x: CN2 CNS RQS S00 SOI UGL UNH UST VMA