MLB Baseballs

Does anyone know if the MLB baseballs sold in local sporting goods stores (i bought mine at Dicks sporting goods) are the same balls used on the field in MLB games or are those just memorabilia balls that are made differently just for like autographs & stuff ,cuz i have a ball i cuaght at a game and it feels considerably ligther and softer leather ans has a liiiittle bit different seams than the one i bought in the store, does anyone know about this ?