Hi everyone, please do me a favor.
1. So far I found on the internet, these are the most common configuration of half bridge.

I want to know what are the advantage (or disadvantage) of each configuration or which one I should use in which situation.

2. In the case of audio smps, I found most of the time people use separate winding for 12V/15V or other output along with the main output winding, while in general purpose smps, they use tapping instead of separate winding. What is the advantage (or disadvantage) of separate winding over tapping?

Can you please give me some basic idea about these?
Thanks in advance