Probably it is easiest to learn the pattern of (2) as a set pattern. Often it is used to imply, as you say, that neither thing has the stated property. "He is no more a writer than she is" -- implies that neither is much good at writing "This is no better than guessing" -- implies that "this" and guessing are both unsatisfactory methods
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Lcchang1. I am not more attractive than John.2. I am no more attractive than John.The term that comes after "than" is 'the standard of comparison'.