Switching between taps of transformer

What's the difference between this two methods of "tap switching"? do they work the same?

^{simulate this circuit – Schematic created using CircuitLab}

Answer

No, the circuits are not the same.

I removed the "fluff" (the rectifiers are irrelevant) and added labels.

^{simulate this circuit – Schematic created using CircuitLab}

The top circuit can output 4 different voltages if the voltages across the separate windings are all different.

The bottom circuit can only output 3 different voltages, when S2b is in the "C" position, switch S2a does nothing.