The A45 AMG simply pulls so far away it can't be seen when compared to the GTI in the canyons. Combine that with the sharper handling of the A45 AMG along with its all wheel drive and the GTI has no chance. These cars just are not in the same class it's rather pointless to have the GTI get beat up.
Bring on the Golf R and let's revisit this in the future as this isn't much of a comparison right now. It would at least have been nice to see more of the M135i and A45 AMG go at it as they are in a similar performance class. A laptime comparison maybe? A side by side straightline comparison would have been nice as well (although the A45 AMG is shown pulling away in the canyon) but since this is Autocar it's their typical vanilla comparison with no real data. The A45 AMG seems to be the best handling and fastest of his bunch though, decisively. This bodes well for the CLA45 AMG.