In the UK, Fazioli, Steinway(Hamburg) and Stuart concert grands are all around the same price. Bechstein are also up there price-wise.
Like the big Fazioli, both Stuart sizes (290 and 220) also have a fourth pedal to achieve a ppppianissimo.
Having named four concert grands of comparable price, I must first say they are all superb makes of pianos. I don't care what Larry Fines says, at this level of quality it really is nipicking to divide them into different tiers.
However the cabinet finishes of the Fazioli and Stuart are especially good!
Tone-wise, it is down to taste. There is a recent thread on the Pianofacts forum asking how consumers can really dislike any high-quality piano that is properly in tune and prepped.
Maybe, maybe not, but given a choice I wouldn't buy a Fazioli bacause I prefer other pianos.
Faziolis overall have a very clear tone. The bass and tenor I love and found them sweet and clear, but the top octaves have a cold quality because of their clarity. I feel the same about the Bechstein D treble - also great pianos.
Chalk me up for a Steinway or Stuart

; but don't let me put you off a Faz or a Bechstein (or Bosie or Bluthner) if you have the £100k.
Regards
Andy