Unreal 4 vs 5 for Robotics development

Thank you for you reply.

My problem is not about “how to use Unreal for Robotics”, it can be handled.
It’s about general compatibility with Linux and ease of use.

I am are trying to choose between IsaacSim and Unreal and my main question is what version in it’s current (and probably future) state is more suitable to be used for this aplication.