OK, the title is a trick–as we know, compassion and wisdom are complementary, and in the end of course there is no difference between them at all. Buddhahood, enlightenment, full awakening is the ultimate development of both, and they are ultimately undifferentiable, like any qualities we may ascribe to the nature of mind for the purpose of discussing it. Buddhahood is sometimes likened to a bird with two wings–both wings have to function fully for flight to take place.
I hear a lot about the importance of engaged Buddhism, putting compassion into action, not thinking it is enough to sit on our cushion or chair and meditate. Sometimes there seems even to be an implication that sitting on the cushion is indulgent compared with being up and about to help others in active ways. Why waste time in solitude when so many are suffering?