Former Nike special project engineer & senior innovator Tiffany Beers occasionally updates her YouTube channel with reviews, breakdowns and discussions of the technical aspects of sneakers. Recently, she uploaded a video comparing two cutting-edge running shoes. Her former employer’s Epic React squares off against adidas‘s UltraBOOST, with Beers directly comparing the two based on a variety of aspects, like price, durability, fit, quality and more. At over 15 minutes the clip leaves no stone unturned, offering truly comprehensive explanations of the rationale behind Beers’s expert opinions.

Does the Epic React take the gold, as we thought? Watch the video above and find out.