On Watermelons (Japanese) blog, on their list of old back articles there are these two articles linked that cover dozens of Base-Neo differences between Japanese and English: Daydream Holic Night 1 : Daydream Holic Night Jason(neo1) Daydream Holic Night Neo : Daydream Holic Night 1 Jason has called out many of these errors, and some other English/JP differences dont affect gameplay in this era, but there are quite a few more that are mentioned that would affect actual game mechanics, but havent been called out in this thread (nor are they mentioned in the Compendium)

Decode Talker More about this Pin Related interests Yugioh Rush Cards Yugioh Transformers Yugioh Four Dragons Card Set Yugioh Mecha Galvanic Mechamorph Code Talker Transcode Talker is Earth Attribute The Fifth Code Talker More about this Pin Related interests Clear Wing Synchro Dragon Fanart Yugioh Clear Clear Wing Synchro Dragon Crystal Wing Synchro Dragon Art Crystal Wing Synchro Dragon Ancient Crystal Dragon Crystal Clear Wing Synchro Dragon Clear Wing Synchro Dragon Attribute: WIND Dragon/Synchro/Effect Level: 7 ATK/DEF: 2500/2000 1 Tuner + 1 or more non-Tuner monsters Once per turn, during either player's turn, when another Level 5 o
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The new expansion looks to be one of the more minor booster expansions, like December's Mew-themed "Mythical Island" set
The back centering is a tiny bit heavier on the bottom but overall, pretty good