Hi Brad,
Two things: the ‘singular’ of NURBS is NURBS (the S stands for Spline as in: Non Uniform Rational B-Spline).
And theoretically Nurbs are mathematically accurate and Bezier Curves are an approximation, but in Blender there is no difference in accuracy between the two:;
here are two circles:

In CAD software NURBS are better (and more used).