Andre Jute wrote [snip for brevity]

There are just three differences between SE and PP, and none are
worth fighting about.

First, a SE amp needs a gap in the OPT. In general, this results in
lower primary inductance, and therefore curtailed bass, all other
things being equal. This is not just a matter of common practice,
because if the SE OPT were to equal the inductance of the PP, it
would be much bigger, and suffer in terms of primary capacitance,
leakage inductance, or both, thus curtailing the top end. Hence the
difference here is fundamental. It is possible to use a gapped OPT
for PP, so some advantages of the gap are transferable from one
topology to the other. One property of the SE OPT is necessarily
unique, however: it is biased into the most linear part of the BH
curve. Any advantages of zero gap belong to PP alone.

Second, the opposition of distortion and power supply products in
PP. Assuming both have perfect power supplies, this boils down to a
matter of quantity v quality of distortion, and ultimately is a
matter of individual perception.

Third, a good PP amp will enter AB operation at the same point that
an equally good SE amp begins to clip.

All the other stuff is about incidental, rather than fundamental,
difference. Without a budget, there can be no sensible argument.

cheers, Ian