There are four simple ways for the observant to tell Mr. Croup and Mr. Vandemar apart: first, Mr. Vandemar is two and a half heads taller than Mr. Croup; second, Mr. Croup has eyes of a faded china blue, while Mr. Vandemar's eyes are brown; third, while Mr. Vandemar fashioned the rings he wears on his right hand out of the skulls of four ravens, Mr. Croup has no obvious jewelery; fourth, Mr. Croup likes words, while Mr. Vandemar is always hungry. Also, they look nothing at all alike.

Neil Gaiman