ZK deviates far further from Total Annihilation, while BAR is much more of a successor.
2 factions with tiered factories instead of the "flat" balancing, and instead of using the local energy grid for Overdrive you build Metal Makers that convert energy to metal for you.
2 factions with tiered factories instead of the "flat" balancing, and instead of using the local energy grid for Overdrive you build Metal Makers that convert energy to metal for you.