I hope you got what you were looking for. If not, I think the main points are:
More sidecut: Easier to turn, less stable running flat, less stable at speed.
Less sidecut: Harder to turn, more stable running flat, more stable at speed.
Generalizing is hard, since a bunch of other factors enter in to determine how skis behave, including ski construction, overall ski dimenions, terrain, snow conditions, size of the skier, skier technique and skill, etc. etc.