I never do burn outs. Tires don't last long enough as it is. Though I do enjoy the 141 lbs-ft of torque.
I also am pretty religious about the pressures and keep them the same as you.
However, I rarely do interstate. I stick to state 2 laners as much as possible. The less straight they are, the more I like it.
99% 2 up.
At least 2K per rear tire pulling a trailer.
These factors are the difference and why they say mileage may vary, I guess.
The Excedra Max tires seem to wear no worse than any others I have had. They may be a tad better, it's hard to say. However, they are much cheaper.
I do like the handling of the Cobra's the best.
I would LOVE to ride someones V2K with a CT to see how it feels. (hint hint)