Hi AVLX,
That’s my tool! 
Even if you were able to make the changes to the skylight without using it too, but how did you solve it, disabling the Sky denoiser too, right?. (I would want to use this encounter to ask you if you could rate it into the marketplace, please, if you like it, as it’s always useful for developers. Thanks!)
Mmm not sure about the difference in your images, but it’s true that path tracing works slightly different than raytracing. Maybe you need to set high numbers of samples and bounces, and global illumination.
You can also share a very basic project with the forum (like that room with your settings), so anyone here can read, try it, and maybe be able to give you the solution, if any of us find it.
Regards!