Each Sneakers has different attributes based on Bronze, Silver, Gold, and Platinum rarity.
Sneaker Rare is one of the main factors which decide how many tokens you may get. Sneaker rare level affects Sneaker Attributes, which are:
Efficiency: determines the rate by which you will earn $VNS tokens. Higher efficiency will result in more earnings.
When a Sneaker is minted, the value of Sneaker Attributes will be chosen at random within the min and max values according to Sneaker rare. Sneakers of the same rare may have vastly different Attribute.