Jackson Hole and Whistler Gradings

Hi All,

My wife and I are considering JH in early March and would appreciate
feedback from anyone who have skied both JH and Whistler (since our
only N.American reference point is Whistler).

We have downloaded JH's trail map and see a high percentages of
double-blacks. Since each resort sets its own grading scale, are the
double-blacks at JH the same gradient as those off the front faces of
Whistler Bowl, Shale Slope, and Horseshoes #1, 2, 3 etc? Or are they
more like the chutes off the top of Blackcomb?

Just looking to built more confidence off the steeps, one step at a
time.

Shawn