The difference between a 20 nm chip and a 5 nm chip is mainly the number of transistors integrated per unit area. It is mainly manifested in power consumption and computing speed. Therefore, the 5-nanometer chip is better than the 20-nanometer chip, which is relatively more power-saving and the computing speed is greatly improved, and it is more convenient and fast for users to use. The above answers are for reference only. For more detailed answers, please consult a professional.