Choose Voidborn for a rotation that uses both skills and M1 attacks. Its +30% damage, +30% critical chance, and 5% cooldown reduction for skills and M1 attacks support several parts of your offense. It is our broader offensive recommendation when you want damage bonuses alongside shorter attack cooldowns.
Choose Fury when direct damage is your priority. Its +50% damage bonus makes it a strong result to retain without building your choice around critical chance or cooldowns. An existing Fury is a sensible stopping point even if Voidborn remains your longer-term target.
Fury has the larger listed damage bonus; Voidborn offers more kinds of offensive benefit. Treat that as a choice between specialties, rather than adding Voidborn's percentages together into a total damage increase.