GP HSMs can be used in any application that uses cryptographic keys e.g. management of the symmetric keys used for database encryption, and management and use of the asymmetric keys used for the creation of digital signatures and certificates to support PKI (Public Key Infrastructure) and crypto wallets.
Payment HSMs have an enhanced set of security features to comply with various payment industry standards. Payment HSMs enforce management under dual-control and offer the payment specific cryptographic commands which are required to ensure sensitive information never exists outside of the HSM.
For a more detailed explanation read our blog here.