You're talking about the dandere definition? That's not completely right. Shyness is merely one of the possible reasons.I actually can't feel shyness from Kurome, hahahahahaha
In fact, I can't even remember a single dandere character acting silent out of shyness. So, nevermind the official definition.
It's easier to tell them apart by how they speak. Kuudere characters can be as wordy as any other, but tend to be calm and composed (or disciplined). Danderes are just silent, unless spoken to, or curious.
Generally speaking, characters like Ayanami Rei (EVA), Nagato Yuki (Haruhi), or Tabitha (ZnT) would be considered dandere. Characters like Hilda (Beelzebub), C.C. (Code Geass), or Ferris Eris (DnYnD) would be considered kuudere.
Edited by S.C., 24 January 2013 - 12:40 PM.