Aries Cerat Helena or Mola Mola Tambaqui?

I am deciding which dac I should take. Mola Mola(8000 euro) I can audition, Aries Cerat Helena (11000 euros) I can not, only direct sale. Mola has volume regulator, Helena not, but it is R2R with tubes like Lampizator, weighs 40kg oppose to 6kg of Mola. Mola is more commercially known and very very good reputation. Both have also reputation as a killer of very expensive dacs.  My system is Tannoy westminssters Roayal and tube monoblocks ith Se-833(similar to Wavac Se-833))Any thoughts or experiences with these dacs?