Quantity supplied refers to the specific quantity of a good or service that a producer is willing and able to sell at a particular price. It represents a direct relationship between the price of a good and the amount of that good that will be supplied to the market.
On the other hand, market supply refers to the total quantity of a good or service that all producers are willing and able to sell at different prices in a given market. Market supply takes into account the collective behavior of all the producers in a market, and represents the aggregate of all individual producer quantities supplied at each price level.
In summary, the primary difference between quantity supplied and market supply is that quantity supplied refers to the behavior of a single producer in response to price changes, while market supply reflects the behavior of all producers in a market as a whole.