Yes, a four-hand piece can sound different when played on two different pianos. The sound produced by a piano is influenced by various factors, including the instrument's construction, size, age, condition, and even the quality of its individual components such as the strings, hammers, and soundboard. These factors contribute to the unique tonal characteristics and overall sound of each piano.
When playing a four-hand piece on two different pianos, each piano's distinct sound qualities and characteristics will be evident. The tonal balance, richness, clarity, and projection of the sound can vary between pianos, which can affect the overall sonic experience.
Additionally, the touch and responsiveness of the pianos may also differ. The action (mechanism) of a piano, including the keys, hammers, and dampers, can vary in terms of sensitivity and feel. This can influence the dynamic control and expressiveness of the performers and impact the interpretation and execution of the piece.
It's worth noting that the pianists themselves can also contribute to the perceived differences in sound when playing on different pianos. Each performer may have their own individual playing style, touch, and technique, which can further shape the sound produced on a particular instrument.
Overall, playing a four-hand piece on different pianos can result in variations in tonal qualities, projection, touch, and overall sound. These differences can add an interesting and unique dimension to the performance and interpretation of the music.