Heinz,You are talking about two different types of instruments..The PSR are arranger keyboards that allow the possibility of creating styles and saved to be called up as a song title...The Roland's you mention are workstations and not arranger keyboards..you do not have the chord recognition[realtime] that an arranger has to play styles...If you need to make a comparison to the PSR,, compare to other arranger models.Roland also has a line and some will do as the PSR music finder..As an example the VA series uses "Music assistant", that is actually user performances, titles as songs[easily recalled for immediate play..].