Summary: Definitely better than YotS. This DLC is a supernatural take on the Sleeping Dogs universe. Unfortunately it suffers from all of the same flaws that the base game did. The atmosphere, however, is a refreshing change. Unfortunately, the story is not interesting and doesn't make much sense. Also, the DLC is super short and will take you at most 2 hours to finish the main mission, and less than 3 hours to finish all side missions as well.
Summary: Incredibly boring. Year of the Snake brings next to nothing new to the table, and yet it takes away so much. Say goodbye to all the moves and upgrades you earned in the main game and say hello to a crappy stun gun and useless tear gas launcher. Use the stun gun to stun enemies for a few seconds so you can deal with other guys. Let me tell you, it sucks and is completely useless. The tear gas launcher is even worse.