True vs Simulated Divided Light?

We are replacing our windows to get energy and sound improvement with double pane. We live in 19th c brick house on landmark block and have permit for work.
Our bid is for simulated divided light windows. Architect is saying that simulated is good now and can make mullions thinner with double pane glass but i am worried they will not look right, especially in parlor. Any experience with simulated divided light double pane for parlor windows? we are doing marvin wood so already very expensive not sure we can spring for the true divided.

By nycseattle |