https://m.youtube.com/watch?v=mfPuRoStEdw
Cheaper baseballs are cheaper for a number of reasons. The cover might be made out of blemished or second quality leather or a synthetic (plastic) material. Some cheaper balls are only wound with two types of yarn instead if three. As pointed out above, official MLB balls are rolled to compress the seams. Balls used in HS aren't rolled and have higher seams