The 163 network and CN2 network in Hong Kong cloud servers are two different network connection types. They have some significant differences in performance, availability, and cost. Here are the main differences about these two networks:

　　163 network:

　　Lower cost: 163 network is generally a relatively cheap internet connection option. It is generally suitable for some lower budget applications and projects.

　　Lower performance: The 163 network may have lower performance and higher latency. This means data transfer speeds may be slower, which may not be ideal for applications requiring high performance.

　　Low availability: The 163 network is generally not as stable and reliable as the CN2 network. It may be more susceptible to network congestion and failures.

　　International connection: The 163 network is usually used to connect domestic and international Internet, but may not be as stable as the CN2 network for cross-border data transmission.

　　CN2 network:

　　Higher cost: CN2 networks are generally a higher cost internet connection option. It is generally suitable for projects with high performance and usability requirements.

　　Higher performance: CN2 networks generally have higher performance and lower latency. This makes data transfer faster and suitable for applications and projects that require high performance.

　　Higher availability: CN2 networks are generally more stable and reliable, and have higher availability for important services and applications.

　　International connection: CN2 network is usually used to provide stable international connection, which is more attractive for cross-border data transmission and international business.

　　Summarize:

　　Choosing the 163 network or the CN2 network depends on your specific needs and budget. If your project is more cost-sensitive and has lower performance and availability requirements, 163 Network may be a suitable choice. But if you need higher performance and higher availability, especially for international connections, the CN2 network may be a better option, although it generally comes with a higher fee. It is important to choose the appropriate type of network connection based on your project needs.