Aha...someone has finally seen this...good for you.
For all intents and purposes, you are correct.
Yes, the routine is different and the pen is different.
Oh yes, and the price is very different too.
I'm a great fan of Greg Wilson, but this seems a bit over the top for what you get.
Using that 'other' pen that you mention, I've done this "pointless" effect for years, along with 'jamming' it thru a dollar as initially learned ;-)
Best wishes...