I think there's same system as in Warcraft III , unit could have very slow , slow , normal , fast , very fast attack but it was based on values between value A and value B so , maybe very fast is from 90-999 ;p
Yeah, so what's your point ?
As I understand it, Azurewrath has a lower bonus to its attack speed compared with the bonus you have on the Blade of Five Suns, but the base item for Azurewrath (the Rapier) has a much faster attack speed than the Espadon, it still is faster overall.
And both display as "very fast attack speed" because there just are not more speed qualifiers to distinguish between various attack speeds.