I don't think any particular topology is inherently superior. A lot depends on implementation and system compatibility. I own two good pushpull amps (a pushpull 45 amp and a 349 amp) and a 2a3 SET (actually a parallel SET). I like both the 349 and the 2a3 SET a lot, perhaps the pushpull 349 more than the other, but, then again, the linestage I currently use is specifically matched to the 349 amp.
In a heartbeat, I would trade either or both of these "favorite" amps for a particular OTL amp that I have had the pleasure to hear. Unfortunately, these particularly amps take up WAY too much space and are extremely expensive, which is why I passed on a recent change to own them.
The SET amp is particularly good at presenting all of the fine detail, nuance, and complex interplay of instruments without being harsh or brittle sounding (a problem with many supposedly "detailed" gear). The 349 pushpull amp is not quite as open on top and does not quite have the same delicate touch as the SET amp, but it delivers a more propulsive bass line and has a fantastically realistic midrange. The OTL I heard is so immediate, punchy and alive that it is startling, yet it is smooth and not the least bit harsh sounding.
Conversely, I've heard plenty of, to me, crappy sounding SETs, pushpull amps (not heard a really crappy OTL, though many have turned out to be somewhat high maintenance).
In a heartbeat, I would trade either or both of these "favorite" amps for a particular OTL amp that I have had the pleasure to hear. Unfortunately, these particularly amps take up WAY too much space and are extremely expensive, which is why I passed on a recent change to own them.
The SET amp is particularly good at presenting all of the fine detail, nuance, and complex interplay of instruments without being harsh or brittle sounding (a problem with many supposedly "detailed" gear). The 349 pushpull amp is not quite as open on top and does not quite have the same delicate touch as the SET amp, but it delivers a more propulsive bass line and has a fantastically realistic midrange. The OTL I heard is so immediate, punchy and alive that it is startling, yet it is smooth and not the least bit harsh sounding.
Conversely, I've heard plenty of, to me, crappy sounding SETs, pushpull amps (not heard a really crappy OTL, though many have turned out to be somewhat high maintenance).