Have a look by yourself… Spec (rpm package build script) file, installed rpm, screen shot with settings window and splash screen…
So, yes, maybe you are right on the fact that the GPU was actually used in OpenCL mode in Bforartists1 despite what it pretends to use (CUDA) in its preferences window, but anyway, Bforartists2 does not recognize my GPU in either of the CUDA or OpenCL modes… That’s a bug, I’m afraid…
Note that I may be able to install the CUDA 9 toolkit and build Bforatists2 with it, since blender 2.80 might build against it (unlike v2.79, that required CUDA 8, but the latter requiring gcc 5.5… that OSL could not be built with… lol !). Time permitting, I may give it a try (but don’t hold your breath on it: I’m not using Bforartists to render stuff anyway, but only for creating/editing Collada meshes)…