geo from Maya / MASH does not look the same as original mesh in Unreal 5.2

I have a Curb asset for my road, from Bridge. I exported the mesh from Unreal as FBX. I imported into Maya

if I simply send back to Unreal at this stage, and simply apply the shader in unreal, it looks identical to what i started with in Unreal.

But, in maya, if I apply this curb to a MASH network (to warp along a curve) and then bring back into unreal, it renders looking SUPER low res even though the wireframe is identical.

What else do I need to do to get this Mash’d geo to look identical in unreal to the static geo I started with?

I dont know if its a maya thing or an unreal thing. the wireframe is identical so im confused what else mash could be doing that unreal doesnt like or whatever.

yay
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wtf
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