Trader A enters into a forward contract to buy an asset for $1000 an ounce in one

Question:

Trader A enters into a forward contract to buy an asset for $1000 an ounce in one year. Trader B buys a call option to buy the asset for $1000 in one year. The cost of the option is $100. What is the difference between the positions of the traders? Show the profit as a function of the price of the asset in one year for the two traders.