FYI Yubico (who makes them) have devices compatible with each. You can technically use the passkey standard with a yubikey security key since it’s all FIDO2 protocols, but it’s certainly not standard
It’s just a question of device bound keys (the default for yubikeys) vs platform / exportable keys (passkeys), but the websites can’t tell the difference if you don’t tell it
FYI Yubico (who makes them) have devices compatible with each. You can technically use the passkey standard with a yubikey security key since it’s all FIDO2 protocols, but it’s certainly not standard
It’s just a question of device bound keys (the default for yubikeys) vs platform / exportable keys (passkeys), but the websites can’t tell the difference if you don’t tell it