Except that they'll only hide it when it helps them. In general this is far more dangerous.
Agreed, the most successful assholes have always been the ones that understood that you can't be a asshole all the time, you need to deploy it at a opportune moment.
If you've got an asshole being strategic about when to be an asshole, you actually have a sociopath, because most folks at the point where they know they're being an asshole would just stop.
Except that such people typically only hide it during the interview phase. You’ll still find out soon enough after they’ve been hired.