Pass X250 has a better bass thanX 350?

My friend who had both amps some time ago told me that X250 has a better lower midrange/upper bass than X350 and the lower octave is more filling and punchy.I want to know opinions of Pass owners:is it true?Which has a better sound overall?Than You in advance.
Having owned both I would disagree with your friend. The X-350 has more control over those frequencies than the X-250. The X-350 has more controlled class A on tap and uses it to the fullest - a great amp!