Is the Bi-wire really that bad?

I used to own a pair of mono run AZ's Satori and loved
their beautiful organic timber very much. When they deliver music it is like your mother singing to you.
And then I swiched to the Hologram II Biwire after have
read many stated that the Hologram would do even better.
I found that the Hologram II biwrie are at least as equally good as the Satori mono were if not improved a
lot. Soundstage is getting greater and clearer, faster pace and better top extention... if the Satori are like
mother singing then the Hologram II would be like father
playing, still an intimate family member communicate with
you, just a bit more majesticness added.
Now my question is: almost everyone agree that for the Hologram II, single wire is the way to go, but, if the
bi-wire won't lift the sound quality, could it be WORSE than the mono run? Or, is it fair to say: the extra money
is not worthy because the mono run and the bi-wire are no
difference?
Any one has incisive opinion?
Thanks!