Discern,
I would think that it would be similar to the auto industry. Acura is made in the same plant, by the same hands, to the same standards, with interchangeable parts as Honda. If the same is true with Savannah and Bushnell, then I would say they have the same chance of having problems or not having problems. However as with the Honda/Acura models there may be "luxury" differences like optical coatings, better tracking adjustments, warranty differences, etc.
I still prefer vortex scopes and Chevy trucks though.