Gabriele suggested that I plot the estimated coating Brownian noise for different values of bulk and shear loss angles and compare with the old code. The expectation is that the estimated noise should vary smoothly and should agree with old result where bulk and shear loss angles are taken the same. In the first plot, I have plotted estimate coating Brownian noise for CTN experiment over the nominal range of bulk and shear loss angles. Since this range doesn't really have an overlap with equal bulk and shear loss angle case, I made another plot in which such a square region is chosen. We can see that the estimated coating Brownian noise is slightly higher (roughly 2.5% from CTN:2390 figure 2).

Let me know if someone can think of a better viewing angle or more insights to take out from this. Code is attached.