Jarod Zhang, a portfolio manager, is preparing to make a new investment, and has two alternative products to select. The first is a stock currently priced at USD 60, and he will get 1,000 shares with fully allocating. The second is a European call option on this stock with strike price of USD 58 and maturity of six-month. The option is now trading at USD 6. If the spot stock price rises up at USD 70 at the end of the six-month, what is the difference between the two strategies?