1. The Hong River (also known as the Red River) is significantly bigger than Hoan Kiem Lake. The Hong River is a major river that flows through northern Vietnam, while Hoan Kiem Lake is a small lake located in the center of Hanoi.

2. Life in the city is generally noisier than life in the countryside. Cities tend to have more traffic, people, and activities that contribute to higher noise levels.

3. Dong Xuan Market is generally considered to be larger than Ben Thanh Market. Dong Xuan Market is one of the largest markets in Hanoi, while Ben Thanh Market is a well-known market in Ho Chi Minh City but is smaller in comparison.

4. Typically, a ruler is longer than a pen. Standard rulers are usually 30 centimeters (12 inches) long, whereas pens are generally around 14-15 centimeters (5.5-6 inches) long.

5. Life in the city is generally busier than life in the mountains. Cities have more people, businesses, and activities that contribute to a busier lifestyle, whereas mountain areas tend to be more tranquil and less populated.

6. A house's elephant is significantly bigger than a house's ant. Elephants are large mammals, while ants are tiny insects.