Who would win, akiyama vs baku?
The following are the criteria
Strategy
Tactics
Manipulation
Teamplay maneuver.
In my opinion, based on the features provided in their own verse, akiyama win against baku.
In terms of the games they have played, the games in the liar game is more complex, the strategy needed requires more depth in order to survive. Thus, in terms of strategy i have to give it to akiyama. In the liar game, It was also shown that akiyama, adjusted his plan mid way in the game which make him also a finest tactician. Meanwhile, in usugui the game was just simple, the strategy is not that complex in order to win, BUT what makes it difficult is the physicial pain incorporated in the game. In liar game, there are a lot of teamplay being shown, probably becuase there are a lot of team based game that was played. Meanwhile, in usugui, most of the time its one one one. The only criteria probably that baku would won is the manipulation part, however it would be difficult to do it against akiyama who sees the opponent plan, 10x ahead.
Remember, in liar game, the game is on the spot. While in in usugoi, prep time matters.
So OVERALL akiyama win in a landslide. HOWEVER, if we are going to use the games played in usugui, there is now way that akiyama would have won, not because he is not smart but because of his endurance. BAKU is proven to be durable after surviving many times a near death experience.