The HSV GTS is more traditional muscle car with rear wheel drive and a big V8. The engine is borrowed from the Camaro ZL1 so it is the same supercharged 6.2 liter LSA V8 we all know and love. The Holden does not have a fancy dual clutch but a 6-speed automatic.
American raw muscle versus German engineering, what wins? Well the more powerful car but it's closer than HSV GTS owners would like it to be. The CLA45 AMG is running high 12's at close to 110 miles per hour. That is impressive.
For as much power as it has and the size of the motor in the HSV GTS, a 12.1@118 is almost a letdown. The CLA45 AMG definitely is poised to be a giant a killer especially once the aftermarket for it heats up.