Does anybody know which is louder?

One 2000 CFM Box Fan
Pro: Moves alot of air for its price.
Con: ITS HUGE!!!! Could maybe place it outside of the grow room...

or

Two 737 CFM CAN Fans
Pro: Small, will move a decent ammount of air.
Con: More expensive for less airflow but possibly quieter.

What do you guys think?

-Haz