Lucius Vitellius, infamous as he was, had yet some energy, but it was not through his virtues, as is the case with the good, but through his vices, that he, like the worst of villains, was formidable.
His Book III Chapter 77: Vitellius versus Antonius Primus. Fall of Tarracina

Equally vicious with his brother
His Book IV Chapter 2: Lucius Vitellius killed