The main reason why I recommend regular Keepass, it's because it's usually whitelisted in company owned equipments (with something like Microsoft Endpoint Software Center), so even if you don't have admin or permission to install your own software, regular Keepass it's still available.
KeePassXC is likely the one that's best for most people who wish to go down the standalone application route: https://keepassxc.org/docs/#faq-keepassx
Since quite a while ago now, Tails switched from KeePassX to KeePassXC: https://tails.boum.org/doc/encryption_and_privacy/manage_pas...
So if you're still on KeePass, KeePass2, or KeePassX - consider upgrading to KeePassXC.