The two buildings are side by side, and the east is higher than the west. Which one should I buy?

Two buildings side by side, buy the house in the east. According to relevant information, two buildings side by side can buy a house in the east, which is facing the sun. In the morning, the sun can shine, and at noon, the sun goes around. In summer, there is no sun for a day. In the west, houses glow from noon to afternoon, so it will be difficult to live in summer.