Having a climb in the middle of these longer time trials suits Cadel more than Andy.
Evans results haven't varied much whether they are pan flat or have a climb.
But most importantly, going uphill means going downhill.
The descent on the Dauphine was not straight forward, and we can guess that it's what cost Wiggins his time.
If there's moisture around again it will be tricky, and the risk taker may prevail (or fail spectacularly). If Evans takes a few risks he could put huge time into Andy the descent, with better skills but also acceleration.
All this talk of Andy's "improved time trialing", is just talk, I'm not sure where it is coming from - Leopard press releases? If he does a good time trial today we can say he's improved, but there is nothing in his results which suggest improvement since 2007.
Still think it's too close to call either way. If you sent them to a Worlds/Olympic ITT Evans would make the time over 95 out of 100 runs, but at the end of a brutal GT, with all the fatigue but also pressure, who knows.