The sound of the new production Grotrian pianos can be described as a having a very powerful bass more so than a piano such as Bechstein.The treble has a very long dwell time with more initial attack than Steinway ,producing an almost wooden flute like character.These pianos are engineered to have a powerful tone,especially in the larger instruments,so that they are at home in a large concert venue or in conjuntion with an orchestra .The actions are made by Renner to Grotrians specifications.I would not compare Grotrian to Steinway,it would be like comparing apples and oranges.A closer analogy would be more like having the tonal characteristics of both Fazioli and Bluthner.