Inline Extraction Fan Tug O' War—A Fair Test?

We set the Hyper Fan 8" Inline Extraction Fan against the Max Fan 8" in a tug o' war style battle. The aim of the test was to determine which was the more powerful fan.

First of all, take a look at the test video here:

 

Hyperfan 8 inch vs. Max Fan 8 inch

Battle of the blowers




 

The results did not surprise me—after all, the Max Fan states 675 cubic feet per minute (CFMs) and the Hyper Fan 710 CFMs.

But do CFMs tell the whole story when it comes to quantifying the power of a fan?

I plan to repeat the rest using an anemometer—rather than pitting the fans against each other tug o' war style. Let me know your thoughts!