Error Handler - Exit Sub vs. End Sub

Why would I want to get out of an Error Handler (after handling) with an Exit Sub instead of just letting it go to the End Sub?

I'm sure it's simple. I just don't understand. Thanks for any help.

Example:

Public Sub SubA()
On Error Goto ProcError

  ''# other code  
  MsgBox FuncA()

ProcExit:  
  Exit Sub

ProcError:  
  MsgBox Err.Description  
  Resume ProcExit
End Sub