Though there is a difference between a cert signature (ML-DSA) and a challenge (ML-KEM), ultimately and fundamentally, isn't real key size still a relevant metric for comparison.
(Everyone dnvoted this like -6/-7. I guess they didn't understand the relevance.)
> [With AuthKEM,] you would replace the ~2.4 KB ML-DSA signature with a ~1 KB ML-KEM ciphertext.