A few that spring immediately to mind:
- Sulin being in Rand's entourage in Arad Domon.
- Gareth Bryne claiming to have been a common soldier during the Aiel War (Morgase's reign) despite being said to have served at a high rank with multiple queens.
- Wildly different portrayal of Rand's warder bonds, with him and Min wondering how the other feels when in the exact same room, but identifying Elayne's emotions from halfway across the continent.
- An Aiel chieftain refering to his homeland as the Aiel Waste.
- Sanderson is apparently too lazy to type "Dragon Reborn" and frequently substitutes "Dragon" in places where characters would say the former or "Lord Dragon." Except in discussions of his role in prophecy, etc. no one in the first 11 books refers to Rand as "the Dragon." He is always "the Dragon Reborn" or the "Lord Dragon." This is admittedly a small thing, but it is representative of how different the writing is. It is not a question of style or taste, so much as ignoring an established practice or useage. There are other similar issues that are less easy to pin down, but characters whose lack of sophistication has been subtly reflected in their speech patterns and PoV narration are suddenly much more erudite or rhetorical. Characters who were very direct and straitforward are suddenly speaking elliptically. Eloquent or subtle characters are blurting things out in awkward phrasings or plainfaced terms.