The best optical performance of a rectilinear lens will always be a larger dome regardless of materials
There are some cases on Nauticam chart where a glass port is suggested when the size is identical. I asked them why and they told me generally glass has better durability and resists reflections but there is no performance difference actually.
In other cases for mid range zoom the dome suggested in glass is smaller than acrylic this is because of the durability point above and the fact that the glass has more trim
On larger ports acrylic becomes very buoyant and the trim becomes unacceptable so there is a tendency to use glass