That porsche in the video is a Porsche 911 S twin turbo. MSRP is $189,150...thats before options.
Yes, comparing stock jeep to stock porsche, even a 10 year old could predict the outcome. But after modification? That's a different story.
That jeep has twin turbo and all that jazz. I believe it was making roughly 1200 hp at the crank in that video. That porsche wasn't stock either, maybe 600 at crank?
Yes, the S63 has the same engine as the CL63 -- though you are correct that the new S-class coupe is just a rebadge CL.
I don't know about the CL63 having launch control and surpassing the CL65... the 65 is a heavier car, true. But any V12 vehicle has nearly all options as standard equipment, which Im reasonably sure includes launch control. This should be true on all S classes.
Sure, a 63 might be able to beat a 65 in 0-60 because it's lighter, but long distance the 65 is the clear winner. You cant argue with a V12 now, can you?