KH probably has more easily accessible steep chute skiing than any place in north america. You can traverse from a lift to most of the 70 chutes, most of which are in the 40 degree range. Overall it has fantastic terrain, but the lift set up is a major drawback. About 70% of the skiing requires you to ski the entire 4,100 vertical to the bottom. If the snow on the bottom of the mountain is not good, you feel like you are wasting a lot of time, and it makes the gondola a huge choke point with potentially long lift lines. The better half of the terrain accessed by the one upper chair demands you ski to the gondola. A big plus is that KH has a $25 (it may be more now) one ride gondola ticket that will give you a 4,000 lift for access to the backcountry if that is where you are headed.
Revelstoke has a 3,000 vert gondola from the bottom, and two lifts at the top, and I believe both have over 1,500 vert, which allows you to stay on the better terrain and snow at the top of the mountain if you want. Reve tends to have less people, and with a better lift set up it feels way less crowded with virtually no lift lines or crowded runs.
Also, the two areas are opposite on sides of the divide and can have much different snow conditions, with one sometimes getting much more snow than the other. For what it's worth, Reve seems to be making a major marketing push this season with lots of good deals. It may be the same for KH, but I haven't seen it.
If you are a backcountry skier, check out the lodge at the top of Rogers Pass on the highway between KH and Reve. It is right next to the Avalanche Center and is a backcountry skiing mecca.