The Radeon Pro Render is a Render Engine developed by AMD , to create a platform on which AMD GPUs can perform very well. Therefor, it is compatible with every major 3D application and every operating System. And even it is made to run as good as possible with AMD Products, it also works with Nvidia GPUs and CPUs. But in those cases, the performance tends to be really bad.
Overall, I think, that the Radeon Pro Render is really close to Cycles. And since the Performance of Cycles even with AMD GPUs is better, it doesn’t really make a lot of sense, to work with the Radeon Pro Render.
What i Really like about this Engine is, that it is OCIO Compatible and comes with a Material library.
But I don’t think that’s enough of a reason to switch or even try out Radon Pro Render.
Especially not since these two features are retrofit table in Cycles and Eevee with Add-ons like BlenderKit and by installing a Custom Color space like ACES.