Edit: I originally thought I had an experiment that showed that a mesh exported from UE4 to Blender would look better in Blender, but now it’s looking like they are actually the same. So it does appear to be some export/import when I go from Blender. I’ll try running through all the settings again and report back.
Also I’m interested in fixing the jagginess that appears to just be an inherent part of smoothed normals. It occurs due to the interpolation being slightly inconsistent between each tri, so at each tri edge there’s the potential for a sharp turn in the normals. I’ll probably make a new thread for that stuff though.