Decentralized domain name systems like Sui Name Service (SNS) - sns.domains - are different from centralized domain systems in several key ways:

• Decentralization: Centralized domain systems are controlled by a single entity or organization, while decentralized domain systems like SNS are distributed and not controlled by any single entity. This means that decentralized domain systems are more resistant to censorship and tampering, as there is no central point of control.

• Trustlessness: Centralized domain systems rely on a central authority to ensure the security and integrity of the system. In contrast, decentralized domain systems like SNS use cryptographic mechanisms and consensus algorithms to ensure the security and integrity of the system, without relying on a central authority.

• Resilience: Because decentralized domain systems are distributed and not controlled by a single entity, they are generally more resilient to attacks and failures. If a part of a decentralized domain system fails, the rest of the system can continue to operate.

In general, decentralized domain systems like SNS offer a more secure, resilient, and censorship-resistant alternative to centralized domain systems. However, they may also be more complex to set up and use, and may not offer the same level of features and functionality as centralized systems.