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

I thank you dill a lot.

mattmiller,

Try enter  www.sugdenaudio.com

Opinions need to be more supported.

The company was founded by James Edward Sugden in England in 1967, a division of Research Electronics. Research Electronics manufactured scientific instruments and test equipment, designed by James Sugden, for Universities. The A21 was the first amplifier to be put into production and was originally branded for a well known local loudspeaker company called Richard Allan. 
The opinions should be well supported.
I said experiences of the gurus.

jperry, 

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

Hello jperry,
My speakers are Monitor Audio PL-300.
They sound very detailed and have fantastic soundstage.
Thanks once more.

kosst_amojan
I have no doubt that PASS LAB has fantastic amplifiers.
I understand your opinion, and thanks about it.
My intention was to know the preference of the audiophiles who have listened Sugden and Pass.

kosst_amojan,

Good ! Thank you for your comment once again. 

teajay,

Thanks a lot. Interesting opinion.

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