Research Feature: A recent study compared Metacognitive therapy versus disorder-specific CBT for comorbid anxiety disorders. Johnson, Hoffart, Nordahl, and Wampold (2017) found that both treatments were effective for patients with comorbid anxiety disorders however MCT may have more rapid effects on anxiety symptoms in comorbid anxiety disorders!
See here for the full paper: https://www.ncbi.nlm.nih.gov/pubmed/28651207