Would this be more secure than using GnuPG (https://incenp.org/notes/2015/gnupg-for-ssh-authentication.html https://incenp.org/notes/2015/gnupg-for-ssh-authenti

Would this be more secure than using GnuPG (https://incenp.org/notes/2015/gnupg-for-ssh-authentication.html https://incenp.org/notes/2015/gnupg-for-ssh-authentication.h...)?