The maps don't use any of the optional starting rooms, for starters.
All 45 degree options are missing, as are odd shapes, stairs, pits, etc, resulting in ignoring or heavily modifying Tables II, III, III.B, V.A, V.E, VI, VII, and VIII,.
The rules also specify that the dungeon must start with a stairs entering a room, but it appears that this actually starts with a passage instead, which doesn't appear to require entering a room immediately.
I don't think the 5e rules are available publicly. If you can find a link somewhere legit (such as wizards.com) then I'll happily put a link up in the FAQ.
As for the older DMG rules that you have, I'll post them up if I end up implementing that version. Otherwise I'll cause confusion :)
The maps don't use any of the optional starting rooms, for starters.
All 45 degree options are missing, as are odd shapes, stairs, pits, etc, resulting in ignoring or heavily modifying Tables II, III, III.B, V.A, V.E, VI, VII, and VIII,.
The rules also specify that the dungeon must start with a stairs entering a room, but it appears that this actually starts with a passage instead, which doesn't appear to require entering a room immediately.
Example: https://www.dungeonstome.com/dungeon/345345345.png The entrance enters the room using a secret door, however there shouldn't be a door between the entrance and the first room.