Funny you should ask that.  I recently picked up both balls.  The NVD I purchased used and had redrilled, the Jigsaw I bought new.

I set up the Jigsaw with the pin above the fingers with the idea to get it a little further down the lane.  The NVD I set up with the pin under the fingers to get a little earlier roll.

Here is what I would say, both are extremely strong.  The Jigsaw will indeed get through the heads a little better and finishes maybe a shade stronger than the NVD.  The cover on my NVD is OOB, which to me looks a little on the dull side.  The thing really gets through the heavy oil well.  Very powerful, arcing finish through the deck, not quite as snappy as the Jigsaw.

I like em both.  Good luck!