Is this comparable or different than these "cryptographically verifiable" ledger DB services? https://docs.microsoft.com/en-us/azure/azure-sql/database/ledger-

Is this comparable or different than these "cryptographically verifiable" ledger DB services? https://docs.microsoft.com/en-us/azure/azure-sql/database/ledger-overview https://docs.microsoft.com/en-us/azure/azure-sql/database/le... https://aws.amazon.com/qldb/ https://aws.amazon.com/qldb/