That video shows the back seats removed from the taycan, it also shows that they set up a separate external speedometer as it's likely they removed the components for the standard display which weigh more. If you can't tell that there are seats missing from the Taycan in the picture then you've already made up your mind and evidence wont change that.

But for the record here is a pic showing the passenger seat for the tesla. https://pbs.twimg.com/media/EErt0cCXYAEm5AV?format=jpg&name=small

Here's two showing the interior doors still have all their paneling. https://pbs.twimg.com/media/EEruDKIWwAARPm3?format=jpg&name=small https://pbs.twimg.com/media/EEr7Q3dW4AE8Wo2?format=jpg&name=small

Regardless, this is a prototype, much like Porsche claimed their taycan was at testing. They both are running modified versions of their car. It's amazing how butt hurt people are that Tesla came out swinging. This competition is good for consumers.