What are the difference between magic weapons and non-magic ones?

[sagaseth]

Originally Posted by Jimjam [You must be logged in to view images. Log in or Register.]

Magic attacks ignore non magic AC … so azure sleeves (12 ac not magic item) and targishin’s mask (similar) are great against mundane attacks but not against ghouls, wisps, giants with magic weapons.

Source: I made it up.

Your last words confuse me. So basically speaking, magic weapons do normal damage against everything while non-magic ones will do less against some types right?