I joked and guessed kilograms @ seconds....
But seriously, someone mentioned it'd be getting a 2.6L blower over the current 2.4L. Could be cc displacement of the blower? 35 psi? Tires? I dunno.
It's also been suggested that the "lightweight"ness was sucked out of the interior through stripping things out like the back seats. And the front suspension...how there? I don't know.
However, customers may have to select an option to ensure that weight gets removed.