Yeah, I saw that one demo'd on YouTube. Pretty nifty.
https://www.youtube.com/watch?v=IhCCeg0D0R0
Comparing the Porsche ones with that demo, the P-car ones look a little different: they don't have that metal chute that the pointed end of the strap feeds through before you bend it with the tool, plus they lack the tabs on each side that fold down (ie are tapped by hammer) on the end of it once it's tightened onto the boot and cut short.
Anyway, unfortunately, I'd already bought the tool for the other type.
In any case, even if I had that tool, what Porsche sent me in no way is long enough to go around the boot and then slip in far enough to go into the slot in the shaft of the tensioner (back towards the handle of the tool). I'll see if I can get myself a refund...