How are you at skiing 3d snow? I think this question would shed light on whether you will thrive or be challenged with a trip out West.
In general, expert terrain out West is steeper and the snow is softer. Many Eastern skiers, used to the paucity of fresh snow, get in the habit of cheating their turns by adding in rotation. In softer snow, powder/crud etc., rotating the tip of the ski out of the direction of travel of the ski will result in instant negative feedback as the snow hooks the ski and pulls it out from under you.
Most decent skiers who possess basic carving skills (clean turns with no ankle rotation) can make a correction and learn to be competent in soft snow, but those who can't have a very hard time. Incidentally, I think this failure to adjust is why I always hear claims of "heavy snow" out of eastern storms, while guys in Mammoth, the PNW, and even Wolf Creek from time to time ski and enjoy thoroughly much wetter, heavier snow- it isn't the snow being heavy, it is the failure to learn to stop spinning the skis around.
As far as terrain, things are steeper. My understanding is there is little in the East that is steeper than 35*. On the flipside, there are not many ski areas in the West that lack slopes steeper than that. The I-70 corridor (WP, Summit County, and the Vail Resorts) has a reputation for being intermediate-oriented places, but almost all of those areas have significant amounts of terrain steeper than the East.
But the snow is softer. The typical eastern skier on expert slopes is likely skiing those slopes in conditions I wouldn't even consider being out on our expert slopes- because I am spoiled and know that conditions will be better in a few days. Soft snow makes a huge difference in how tough the terrain is to ski- as long as you can ski soft snow. If you can adjust to softer snow, I suspect you will find that non-technical expert terrain in typical Western Snow conditions is well within your comfort zone.
As far as specific places, Jackson gets much more snow than Aspen (~400" vs 275-300) and the snowfall seems less volatile there.
Aspen is pretty immune to crowds even on peak season days. I have heard Jackson can get busy at peak season but is generally pretty quiet otherwise.
Stay off the I-70 corridor Presidents day. However, the best terrain and best snow in CO is also away from I-70.
Have you looked at Telluride? Pretty immune to crowds, one of the best views of any ski area anywhere, and difficulty that scales well from Advanced all the way up to as nasty as you can get inbounds. If El Nino plays out, Southern mountains could have a great year. Silverton is in the neighborhood and also offers an unforgettable experience to demonstrate what the San Juans are all about- Bowls, steeps, chutes, and couloirs galore.
Taos is another one that this could be a good year to look at. Lots of steeps, lots of vert, and a good progression from "that was tough" to "WTF am I even doing up here?" The most memorable run I had all year was getting on Stauffenberg (after 10+ minutes screwing up my nerve on the ridge).