An apparel designer analyzed the pants Lululemon accused Costco of copying — and sided with the warehouse club

A customer shops at a Lululemon store in Florida.Joe Raedle/Getty ImagesLululemon sued Costco, accusing it of selling apparel that appears to copy the athleisure brand's designs.Joe Ng, CEO of fashion studio Shift, compared pants from the two companies in a YouTube video.Ng said the Costco pants mostly used common elements and techniques.An apparel designer has weighed in on the controversy surrounding a pair of Costco pants that bear a striking resemblance to a popular Lululemon design.Lululemo