Inconsistent Lightmap Resolution

I have two objects that have the same lightmap settings (scale in lightmap =1) being baked to the same map, but the baked result shows one object's lightmap at about half the resolution of the other. Both objects have a separate lightmap UV channel in Maya and they have the same texel density. Any idea what's going on?

Here are the lightmap UVs



And here's the baked map in Unity



Thanks!