What Class A is better? SUGDEN FPA-4 or PASS LABS XA-25

I heard a Sugden a few years ago driving a pair of Harbeths 30.1 and it was a match made in heaven.  I have heard the Pass 30.8 but not the xa25.  The 30.8 is tough to beat if you have the rack room, a strong back and need a large space heater.  The Pass xa25 solves all the negatives I have listed with the .8 series and Teajay's review is more and favorible. Btw I am in the market for a low power amp and the xa25 and the Linear Tube Audio ZOTL40 are my top 2 choices.

Looking at the parts only inside viewpoint, the Pass25 has got the nod over the Sugden.

Bigger trany
More supply capacitance
Multiple smaller PS caps for lower esr
More heatsink fin area, which makes me question the Sugden’s amount of Class-A.

Pass:
http://www.6moons.com/audioreviews2/passlabs3/open.jpg

Sugden:
https://i.pinimg.com/564x/5d/79/d3/5d79d3b2cae87e51ce6b5adc221db1bc--audio.jpg

Cheers George

The question is based on listening!
It is not a project comparison.

designed by James Sugden, for Universities. The A21 was the first amplifier to be put into production

I think you’ll find one that I had was even earlier, the Sugden P51 C51

Cheers George

Sugden P51 C51 pre/power
In case your wondering, 1960's
http://img.canuckaudiomart.com/uploads/large/1792160-sugden-p51-and-c51-combo.jpg

Cheers George