As one of the key people responsible for Nike's auto-lacing mechanism found in the 2016 Mag and HyperAdapt 1.0, it's safe to say that former designer Tiffany Beers knows a thing or two about sneaker technology. And that's exactly why she may have just dropped the definitive Epic React Flyknit vs. Adidas Ultra Boost comparison. 

In her latest YouTube review, the former Nike special project engineer and senior innovator breaks down nearly every aspect of the three-year-old Adidas sneaker and the recently-released Epic React, which many saw as Nike's answer to the Ultra Boost. 

Looking at the runners from a designer's perspective, Beers breaks down categories including price, availability, aesthetics, comfort, quality, durability, and much more. Both sneakers tie in several categories, and there's even one where neither get her stamp of approval, but we won't spoil it. Click play on the clip above to find out which sneaker reigns supreme in Beers' eyes.