I wouldn't count on transmission failure this time. His old North American Fiesta was a Olsbergs MSE built rallycross car adapted for stage rally. Adapted rather poorly actually. You can see in the video below the difference in suspension articulation between the two cars. The rallycross based car is a lot stiffer, which hurt him a lot.
This car is a Fiesta WRC (basically) built by M-Sport. Ultra reliable. He can definitely still flip it, though.
Side by side with our cars, there is really only 1 person (that I know of) who has driven the new generation WRC cars and our heavier production based cars, and thats Patrick Richard. He said in an interview that the WRC cars, while nimble, don't have the power that our cars have (more than likely from the fact that the WRC cars are 1.6l turbos, and ours are up to 2.5l turbos). I could see them being very equally matched. He can sling it through the corners quicker, but our cars will be going faster.