The Sonus Faber Grand Piano Concerto used to be my "high end" speakers back in the day. It must have been more than 25 years since I listened to these. They Grand Piano Concerto is the floorstander version of the Sonus Faber Concerto. The HOME series are the newer version of the original/standard Concerto and Concertino.
It’s useful to note that the Concerto Home does not sound warm. The Grand Piano Concerto did sound warm to my ears. They need a Krell KAV-300i to bring the treble from rolled off to sounding acceptable.