Memory latency and cache hit rates.
That’s really what Zen 3 brought that Zen 2 didn’t have, and Vcache took it to the next level.
If you have all the data at the cores when they need it, there’s little to choose between them, but the limitation in flight sims, and especially in VR, is having the data you need on hand when you need it.
That is what the 5800X3D excels at.