The main difference between corporate level strategy and business level strategy is: See pp$\mathrm{.}17-18]$

Corporate strategy defines the scope of a firm's activities, while business strategy focuses on how to beat the competition in specific product markets

Corporate strategy defines a firm's overall structure, while business strategy describes its actions

Corporate strategy comprises the overall strategic plan, while business strategy focuses on implementing that strategy in each product market

Corporate level strategy is concerned with long term goals, while business level strategy focuses on short term competitiveness