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

I thank you dill a lot.

I have no dog in this fight but that picture of the Sugden amp looked weird to me, no capacitors that I could see. Did some googling and this review:

http://www.hi-fi.com.pl/testy/ko%C5%84c%C3%B3wki-mocy/3465-sugden-masterclass-spa-4

Though in, I think, Russian has what looks like a more accurate internal shot of the SPA-4.

My homebrew Pass F5 is more robustly built than that Sudgen, and so is the XA-25 by a country mile. There’s a ton of stuff that just screams "CHEAP!!!!" to me. A 300VA toroidal is the bare-bones minimum for a 30 watt class A amp. A 400VA center tapped with dual rectifiers would have cost marginally more. What’s more, the power supply filtering is built into the amp boards. They’ve bolted everything to the bottom cover of the chassis rather than install a proper bottom plate. The chassis itself isn’t anything particularly remarkable either. Bottom line: it’s built to a tight budget. That’s an MSRP $1500 amp at best.

I have no dog in this fight , Sudgen sold back in 2013 for $4400