One of Jaylen Brown’s biggest points of pride has been that fans who purchase his sneakers get to wear he exact shoe he dons on the TD Garden parquet — nothing more, nothing less. That’s not typically the norm in the sneaker industry, he said. “Usually, the athlete is wearing something totally different from what’s being sold, because they want to increase the margins,” Brown said. “Kobe Bryant wasn’t wearing the same shoe that you go buy. But, you’re wearing the same exact shoe that I wear.”