thanks for that Alone and forsaken. I also record using normal methods (whenever time permits) but i use an arranger because i can reconfigure songs that i perform with my church choir (black Gospel music ) very quickly. I use only my own patterns with original bass lines chords etc. It allows me to try out several different grooves to a song actually in real time so i can instantly gauge how the choir are feeling the song and make adjustments on the fly.I can transpose a song instantly (without using the buttons) or completely reconfigure the song adding chorus, or altering the bridge etc "live" . This just could not be done with a standard workstation. When i know how the choir is responding to the progressions i then record it again instantly on board the instrument and can immediately relay the style that i want to any live musicians that i want to get involved.

Thats why i think arranger keyboards specifically have a clear advantage over other types of work stations and thats what makes them unique in the array of musical instruments.