Well, the ContiProContacts are OEM on my 07 Passat. The Michelin Energy's were OEM on my 02 Passat. The Energy's definitely gave long tread wear, but gripwise, they were horrible. I had serious torque steer on a manual tranny front wheel drive that only produced 170HP. Not good. The tires still had good tread at 38,000, but I just couldn't live with them anymore. Replaced them with Bridgestone Potenza G009's, the torque steered disappeared, even on wet roads. And I couldn't believe the reduction in understeering....it felt almost like a new car. I don't know if the Michelins were that bad or the G009s were that good.
The ContiProtacts on my 07 seem like decent tires. But I really don't have anything else to compare them to because I haven't had any other tires on this car. And comparing them to the G009s on my 02 would be unfair because the 07 Passat is far more advanced and handles more like a sports sedan than a family car (like the 02). However, I was able to get the Contis' to break lose going on a circular off ramp the other day. I really pushed it to see what it can do and the ASR lights started flashing before the car felt like it should lose control. I was never able to get the G009s to break lose, but again, it was on an inferior chasis.