If you want to compare apples to apples Zen 3 is supposed to offer 20% more performance vs Zen 2 and offer the same max 64 cores as current generation. Granted

If you want to compare apples to apples Zen 3 is supposed to offer 20% more performance vs Zen 2 and offer the same max 64 cores as current generation. Granted they are expensive with the current 64 core CPU part coming in at $5800 and the whole machine easily closer to 8k but if prices remain similar the top end mac pro will probably perform less ably than a machine based on the AMD part and cost about $15k. Apple will of course retain its crown as the fastest OEM of hardware that runs its own OS since it will remain the only one legally allowed to do so.