Very. And that's a good thing. Pianists play differently even in their efforts to realize the composer's idea and specifications as authentically as possible. The interpretation is also very different. In the past this seemed to be much more common - perhaps also because not everything was yet audible in the media for comparison. Welte did business with this difference and had the same pieces recorded by the most sought-after pianists of the time - and also presented their differences in advertising.

Thus, not only the recordings of the same pieces by different pianists differ, but also the same pieces by the same pianist if they were recorded at different times. This can be compared, for example, with popular pieces that pianists have recorded for different systems - examples of this are Liszt's Liebestraum and also the Campagnella. From the point of view of interpretation, especially the recordings of the direct pupils are very interesting - as long as the composers themselves have not recorded them. For example, the recordings of Liszt's pupils.