Complex sentence: With the sole exception that Prince Edward Island has slightly greater per capita representation than the Northwest Territories, each of the territories has considerably greater per capita representation in the Commons than any of the provinces, although the territories have more limited autonomy than the provinces.
Split into simpler sentences: With the sole exception of Prince Edward Island having slightly greater per capita representation than the Northwest Territories. Territories has considerably greater per capita representation in the Commons than every other province, but have more limited autonomy than the provinces.