System
Windows 10 Pro, intel i7 [email protected], 32 GB
2 AMD Radeon RX 5700 XT, 8 GB; latest drivers The above pictures are very similar.
Unfortunately, openCL render very different, as if there were a hidden plane mixed with the procedural texture. The latter can be seen very faintly. The correct and intended look is the one of viewport and CPU path. Please, fix this issue

I guess, sooner or later somebody else gets stuck with this current behavior of openCL rendering in combination with particle system.
Here is the scene file. Change from CPU path to GPU path (openCL) to see the difference.