Material card refers to putting an athlete's jersey or sneakers into the card. This kind of card is usually rare because the number of jerseys or sneakers is limited. Signature card refers to the card with the autograph of the star, which is also very valuable, because the number of signatures is limited, and the signatures of signature cards are often signed by the players themselves, which is more precious.
Generally speaking, the collection value of star cards mainly depends on the rarity of cards and the popularity of players, while both material cards and signature cards have their own unique collection value. Which card is more valuable may be different due to market supply and demand, the popularity of players, the rarity of cards and other factors.