are there any comparisons ?
for example, World of Tanks enCore RT used (for RT shadows) embree (CPU) for bvh building (1.5M triangles), and DX11 Compute for RT tracing (this BVH with triangles)

from here,
https://gamegpu.com/mmorpg-/-%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD-%D0%B8%D0%B3%D1%80%D1%8B/world-of-tanks-encore-rt-test-gpu-cpu