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


I`d like experiences of the gurus.

Thanks
sacresta
jperry, 

Thanks a lot.
Your opinion is based in facts, not in supositions.
Thats what I need.
Good, very good. 
@sacresta,

You are welcome. Not sure what speakers you are using, but I heard the Sugden FBA 800 with the Wilson Benesch Vector speaker and it was a fantastic match. Also great with my ProAc Response D-40r
In all reality, they're two completely different topologies. Pass doesn't sell any single ended class A amps anymore. They're all push-pull which is why the XA-25 is a more muscular amp. That Sudgen is clearly a single ended amp. 
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Hello jperry,
My speakers are Monitor Audio PL-300.
They sound very detailed and have fantastic soundstage.
Thanks once more.