Additive Animation - not matching Maya Layers

Hey,

I am running into an issue with additive animations. I have an animation set-up in Maya with layers.

I export two animations; the base animation, and the layered animation (this is additive in Maya).

When combining the two in Unreal as additive, the result is similar but not the same, between the combined animation in Maya and in Unreal.

The left is the combined animation from Maya, the right is combined as additive animation in Unreal.

Is there a way to get these animations to match?