Replica jerseys are slightly cheaper versions of the authentic jerseys that players wear on the court. They are made from less expensive materials and usually don't have the same level of detail as an authentic jersey. However, they are still high quality and look great!
Authentic jerseys are the real deal - they're exactly what the players wear during games. They're made from high-quality materials and usually have sewn-on logos, names and numbers. They're more expensive than replica jerseys, but they're worth it for true NBA fans!