Do you know why they would label the s as a class3 and the x as a class 2?Also adjustable is the maximum assist level. If you want to allow a younger/less experienced rider use your bike you can limit the amount of assist that can be accessed so they won't race off in "Race" mode! Other manufacturers should be envious of that. This is really a wonderful bike.
That may have been me. My CC "S" is labeled Class 3. I am sure the "X" models are labeled Class 2. Am only speaking about the CrossCurrent series because I researched these.