I would put it this way:

• Kundalini awakening is the liberation of one’s life-energy from the narrow confines imposed by human fear and conditioning. It heals and enlivens the whole body with glowing vitality. It elevates one to a higher level of functioning and flow, in harmony with the universe.
• Enlightenment is the liberation of one’s consciousness from the narrow confines of the human mind and ego. It replaces mundane misunderstandings and false beliefs with pure awareness and true insight. It awakens one to the knowing of absolute truth, understanding the essence of all being.

They are not exactly the same, but more like the yin and yang aspects of awakening — the explosive creative power of kundalini and the silent inner knowing of enlightenment.

One does not necessarily lead to the other — kundalini can certainly flow without enlightenment, and enlightenment can certainly come without kundalini — but the awakening of one definitely increases the possibility/probability of awakening the other.