The user reports that the Landscape Spline Width and Side Falloff isn't respecting Unreal Units in the Editor. The usage for comparison is a Cube that is scaled up 7x to Splines that have a Width of 700 and Side Falloff of 10. 100 Unreal Units equal 1 meter so the 700 width Splines should have equal width to that of a 7x Cube.
Expected: The Cube mesh and the Spline Mesh should match almost exactly
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-84559 in the post.