I have a bunch of reebok pucks, and some have imprinted on the side "official match puck", while the rest have "training puck" imprinted. I really can't feel any difference at all, and I even believe they costed the same. Anyone knows the difference between them?

Cool, never noticed there were differences. My youth team uses the blue pucks sometimes and obviously those are different...but I never noticed that there were different markings on the sides of the black pucks.