evt.target question

[absolutezero342]

Is it wrong to do this?

some_mc.addEventListener(MouseEvent.CLICK, someAction);

function someAction(evt:MouseEvent):void {
   evt.target.x = 100;
}

I've seen many people/tutorials that use an extra step like this:

some_mc.addEventListener(MouseEvent.CLICK, someAction);

function someAction(evt:MouseEvent):void {
   var new_mc:MovieClip = evt.target as MovieClip;
   new_mc.x = 100;
}

what is the advantage/benefit of adding the extra step? I'm guessing it has something to do with memory usage? just curious...thx!