I work with a guy who was an athlete for UT within the last 5 years he was a captain on his team and all American and he said Adidas gave them a ton of gear ( meaning more than his other athlete friends at other schools that have Nike or UA) however he said the product was sub par to other brands of athletic gear. He said shoes fell apart quickly, clothes got holes and prints fade.
I personally think in the last couple years Adidas has stepped up and done some pretty cool alternate unis, their cleats, gloves and fan gear have all improved looks wise. It's been said and "new" makes you feel different. Even if the colors, fabrics/materials and quality are barely any different, the brand and newness is what will be the big difference to the players.
As far as fan gear goes I just think Nike makes better looking stuff period. I do hate the price tag though!
Anyway, though the coworker opinion was interesting