Comparison Table

Feature	Blockchain Messenger	Distributed Storage Messenger
Fast account creation	YES	YES
No personal data required (phone number, e-mail, phone book)	NO (some products have integration with personal data)	YES
IP address not exposed	YES	YES
Strong encryption (ECIES algorithm protection)	NO (some products have weaker encryption algorithms)	YES
MiTM attack not possible (ECDSA protection)	YES	YES
Message order is unchangeable	YES	YES
Messages cannot be completely removed from data storage	YES	YES
Consensus message integrity check	YES	YES
Messages cannot be censored	YES	YES
Full access from any devices if user has keys	YES	YES
All data is stored in distributed network (you have no need to store data locally)	YES	YES
File changelog (blockchain-based)	NO	YES
Messages can be deleted for user, but stored in history of chat	NO	YES
History is accessible only for chat participants	NO	YES
Blockchain is not overflowed by messages transactions (this approach speeds up message distribution for users)	NO	YES
Zero-proof for messages	NO	YES

As we can see, Distributed Storage Messenger offers more secured, controlled by participants and reliable approach for decentralized data exchange systems and networks.