They're both similar, half uphill, half downhill and no real corners. Do as little work as possible in the draft on the downhill and move up on the uphills if you need to.

Difficulty depends on who shows up, not on the course. I never understood how a course could be difficult and I still don't.

Can't say much for keys/breaks. The courses are simple, it'll come down to how hard the group wants to hurt on the hill 30 times in a row. Breaks succeeded in each of the men's categories last weekend at City Park.