I owned an X1, used it with a Pass X150 into Magnepans. A Wadia 302 was main source. I never did compare it to an Aleph P though, but did with an X2.5. Yes the X1 was “better” overall, but not by what the difference in cost between the two was in my opinion. Not much help really. I do love most of Pass designs, in my system above, I felt it all to be slightly bland however, just not enough “color”-shock, horror! Like most things, all depends on what a person favors or puts priority on sound wise.
Holbo TT-Nag 110-Croft phono/Innuos Zen MK2/LinnenberG Telemann DAC-Preamp/LinnenberG Allegro monoblocs/Duevel Venus/LinnenberG Maestro SE-Senn. 660S DH Labs cabling
Croft Series 7 amps, WLM La Scala, Naim Uniti1, Naim Nait XS3, Naim ND5XS2, Guru Junior