I think in terms of Silver v Bronze, you have to look deeper. Driver dimensions and how they are applied are meaningless!
A very shallow dive reconfiirmed my thoughts that the current generation Silver lineup is a serious step above the Bronze, and this goes from everything from cabinet construction to driver design, and possibly XO design. The current Silvers have much more in common with the previous generation of Golds and the Platinums than they do with the Bronze lineup.