What are the differences between the Adults Only and Mature versions of Manhunt 2?

According to the Wikipedia page on the game,

Originally scheduled for North American and European release in July, the game was suspended by Rockstar's parent company Take-Two Interactive when it was refused classification in the United Kingdom and Ireland, and given an Adults Only (AO) rating in the United States.[1] As Nintendo, Microsoft, and Sony Computer Entertainment do not allow AO titles on their systems, this effectively (if not technically) would have banned the game in the US as well.[2] In response to these ratings problems, Rockstar censored the game, blurring the screen during the game's executions and removing the scoring system, where players were awarded for particularly brutal killings.[3] This edited version was rated M in the US by the ESRB and was released on 29 October.