See their definition of vacated judgment, of course:

"A vacated judgment is usually the result of the judgment of an appellate court, which overturns, reverses, or sets aside the judgment of a lower court. An appellate court may also vacate its own decisions."

Not only can vacating be the same as reversing, but it can also mean "overturning" which is the exact same thing as reversing.

Maybe the differece is in the "setting aside" part.