Hi,
a workstation is basically a synthesizer with a sequencer included, plus it can have additional functions, like arpeggiators, loops etc. You can create midifiles/songs in them. They do not have styles built in , like arranger keyboards do.
So if you want something that plays styles in realtime like your VA7, a workstation won't do it.
The last workstation I had was the Korg O1W, but that was many years back, the modern ones probrably do a bit more.

best wishes
rikki