Anything SS sounds better than D'Agostino ?

The Sugden A21se single ended pure class A will give your pass lab a run for its money. It is based on the original circuitry developed by Sugden well over 50 years ago. They pioneered SS class A, they were first....and this model is only the lower tier model....the Masterclass series is even better...go and read all the countless wonderful reviews for the A21se.

"The A21 was the worlds’ first production pure class A transistor amplifier and a great success.

The partnership with Richard Allan was short lived and within a year the amplifier was renamed the SUGDEN A21."

https://www.sugdenaudio.com/a21-history

https://www.sugdenaudio.com/james-sugden

https://en.m.wikipedia.org/wiki/Sugden_Audio#:~:text=Founded%20by%20James%20Edward%20Sugden,with%20h....

Change the premise of the comparison; I’d wager the D’Agostino amps would be used typically in conjunction with larger, über-expensive, multi-way, lower efficiently and passively driven speakers with rather complex and power-draining cross-overs, which are in the dire need of a proper amp-kick in the b*llocks to begin with to have them wake up. Use an amp costing much less or even a fraction of the D’Agostino in an active configuration with higher efficiency speakers, and that cheaper amp would be comparable looking into a much easier load without the interference of a load-varying passive cross-over. Amps like the D’Agostino’s are a symptom of extravaganza and difficult speaker loads; change the circumstances, and it’d render them unnecessary.

I would prefer the combination of Sony's SSAR1 driven by that 40 year Anniversary VFET designed by Nelson for them. No bipolar no Mosfet but pure VFET. Not for sale though. Otherwise increase speaker efficiency and do it easier.
Plenty of great sounding & looking amps with low power.

G

Better, not sure.  I will say hearing Luxman and D'Agostino side by side I was really happy to afford the Luxman. :)

Also, Ayre.  Is it better?  No, but it is different, and wonderful.

You really should listen to them all.

nothing transistor sounds better.

Depends on what speakers to drive...