World Machine To Unreal Optimization

Hi there, I’m working on a ~12km x ~12km landscape in world machine and I want it to be optimized as best as possible. I’m using world composition for my tiled build. Is there a performance difference between using fewer 2017x2017 tiles or more 1009x1009 tiles? I also realize that it’s the number of components that make a difference for sure, but will smaller tiles be easier on performance when streaming them?