Hi Dnj


For what I could understand: Groovyband requires a PSR keyboard or Tyros or genos. Sound quality will depend on the keyboard associated with it.
vArrageur is delivered with sounds in SF2 format and can load all SF2 you want.
the RAM on your computer allows it as well as the OS .
In addition vA lets you load any VSTi (up to 16) free or paid software

Groovyband will play exclusively Yamaha styles
vArranger can play up to 5 style formats ( Yamaha,Ketron ,Korg,Roland,Tecnnics )

Both have several MIDI entries and allow you to connect several keyboards

Groovyband only has a MIDI output connected to the PSR
vArranger has 3 MiDI outputs and allows to distribute to the local synthesizer, VSTs and for example
one MIDI out for expanders or synthesizers .

I wouldn't go into the details here , it would take me the day .

Groovyband seems to improve the low and mid-range PSR significantly , Henni will not say otherwise .

To arrange , I invite you to visit the Forum or you will learn more .