sir audioboy, para kasing sagot eh. hahaha
wala pa kasi akong time para i-audition uli both and amx to compare. hope to find the time soon...
so opinions lang muna for now regardless of personal preferences.
let us talk more serious now.................
IMHO, now that you're so curious how different brands differ in sound, i advice you to leave that mind boggling question first.
I advise you to focus on the characteristics of the tubes used in an amp. when i say tubes, i refer to the output tubes. ignore the driver and rectifier tubes in the meantime as they will become interesting only when you are already familiar with the output tubes.
reason: you may be comparing brands but of different output tubes. hahaha. ibang iba talaga tunog nyan.
know the distinction between these tubes: EL34, EL84, 6550, KT88, 2a3, 300b
Note: Almost all, if not all tubes, have tube equivalent. These equivalents too may sound different.
Next, you have to understand circuit design. not necessarily on how to make an amp but on the characteristics of some designs like Single Ended Triode (know what triode tubes are) and Pushpull (UL/Triode) configuration.
Brand for me is the last thing to consider. ofcourse, one thing that is nice about branded gears is their high resale value.
Read............read audition and audition........ then know your preference.
cheers!