Sugoi RSE Speedsuit vs RS Skinsuit

I’m looking for feedback on the RSE speedsuit. I have several of the RS skinsuits by sugoi.

The description between the two sound similar. It looks like the RSE speedsuit has a different fabric around the armpits and the legs have the wider band. It also has an “aerodynamic cover for race numbers.” Does anyone know what that is?

The RS skinsuit has fabric called “ultra aero” (great marketing) but the speedsuit does not. Does anyone have any thoughts on which suit would be faster?

Here are the two different models:
http://international.sugoi.com/usa/custom/bike/rse-speedsuit-10014880.html
http://international.sugoi.com/usa/custom/bike/rs-pro-skinsuit-10014970.html