The variance in addresses stems from the distinct key derivation paths employed. While the derivation path has been standardized in accordance with the ADR-8 specification, Ledger had implemented its own path prior to this standardization. To maintain compatibility with existing keys and ensure a seamless transition, the “legacy” path on Ledger is retained. It’s essential to note that all other Oasis wallets adhere to the standard derivation path outlined in ADR-8, contributing to a unified and standardized user experience across different platforms.