What's the difference between muy and tan? In what context are they used?
La ciudad de Naga no esta tan lejos desde aqui.
Mi hija es tan/muy(?) bonita.
As Flamma explained they are not quite the same thing.
You would be saying that
It would mean
When it comes to
It would just mean
Having said that, I'm sure your daughter would be pretty, if you were to have one.
"Muy" is superlative, like "very". "Tan" is comparative, like "as".
Mi hija no es muy bonita => My daughter is not very pretty. // It's an absolute valuation of her beauty.
Mi hija no es tan bonita => My daughter is not as pretty. // It's a comparison, a relative valuation: She is not as pretty as you said, or she is not as pretty as your daughter.