Assassin's Creed 2 Xbox One vs Xbox 360 comparison video (https://www.youtube.com/watch?v=RmnJvv-peF4) from Polygon.
Accompanying Polygon article. (http://www.polygon.com/2016/11/17/13670084/assassins-creed-2-remaster-xbox-one-comparison-weird)
Man, what happened there?
In mitigation, Ubisoft's Xbox One product page (http://store.ubi.com/us/games/brands/assassin-s-creed/xbox-one/) is currently broken so it's not like you can buy it.
Cheap ports :(