Whether or not they're the same as a bit of a red herring, the question is whether the marginal added benefit of cryptographic phishing resistance is worth the trade-off in UX which introduces new kinds of vulnerabilities due to undesirable user behavior and/or implementation workarounds. And to answer that question you can't just dismiss the security offered by password managers—it's a very real protection that needs to be factored in to your assessment of the strengths and weaknesses of each system.
Which user/comment are you referring to? The top-level comment? I'm the person you replied to initially, and that's not what I said, so I'm assuming you're referring to something else.
I have no idea who you are, am comfortable with who does and does not believe me here, and think you should do you. But no: the two approaches do not offer comparable practical security.
From the questions and comments across the rest of this thread, the misunderstanding here seems clear: the person I'm responding to did not realize that FIDO2 cryptographically binds credentials to sites.
