Olbert and colleagues (2014) reported considerable heterogeneity within the criteria of individual diagnoses, showing that in the majority of diagnoses in both DSM-IV-TR and DSM-5 (64% and 58.3% respectively), two people could receive the same diagnosis without sharing any common symptoms.
Reference: C. M. Olbert, G. J. Gala, L.A. Tupler (2014). Quantifying heterogeneity attributable to polythetic diagnostic criteria: theoretical framework and empirical application. J. Abnorm. Psychol., 123. pp. 452-462.