I seem to remember that on one of the Porsche forums there was a table/chart that showed the differences between these three rear spoiler options, such as weight differences and performance numbers. I have spent a good while searching for it but can't find it. I'm interested in knowing how these three rear spoilers compare in terms of both weight and performance (downforce, drag, acceleration, speed). Any insights would be most appreciated!

Interesting, I would be interested to see this also if available.

Does anyone know at least the weight savings (if any) by going with the sport design kit or aerokit cup kit?

At the end of the day it's more about aesthetics than any performance benefit that would even be measurable to an average driver. What are you trying to justify?

The only weight savings would be with the rear spoiler. Switching it out with the duck would be less than 10 lbs by my estimation and memory from picking up the pieces.