That’s kind of an odd question, because it’s like asking “what’s better – steak or pancakes?” Aside from being food, the two items couldn’t be more different, and an answer would most likely depend on your mood and the time of day. Is one a substitute for the other, and does either make the other option seem less desirable? I say no.
The Mercedes-Benz SLS AMG is meant as a refined but really-stinking-fast street car, whereas the Dodge Viper ACR is meant for track days, and any concessions to comfort are coincidental. The two are as different as, well, pancakes and steak. That doesn’t make the video any less enjoyable, as who among us wouldn’t jump at the opportunity to play with either car in a top secret desert location? Besides, the top notch cinematography makes the video pure car porn, so enjoy.