Switching between taps of transformer
No, the circuits are not the same.

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







simulate this circuit &ndash; 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.