It's a slight advantage, but most schools have a ton of different kinds of basketballs in order to prepare for the basketball they will use the next game. Iowa State has Under Armour, Nike, Spalding, Wilson, European style, etc. Usually the Nike schools have a deal with the company where the basketballs are provided with their uniforms / gear.. same with Adidas and Under Armour. If anyone has played with the Under Armour ball before, you'd know how terrible it is. It feels like a rock and feels weird coming off your hand when shooting.
The Wilson ball is used for the NCAA tournament and the Big 12 Tournament and a lot of teams use that as their primary ball for home games, regardless of whether they are a Nike, Under Armour or Adidas school. I like those a lot and am surprised that more schools don't use that considering it's what you'd use if you made the tournament.