Since there is no demo for vArranger, I cannot compare. What I CAN say is that there are some stunning effects added to many of the guitar voices. It seems like Groovyband is mostly about adding more effects to styles. Yamaha styles are generally known for relying heavily on effects, so these new effects do add great value to the nearly 900 supplied styles.

Pity I cannot duplicate these results direct on my arranger as I now miss those effects sorely after auditioning the Groovyband styles. (i.e. my new 220CountryStraitsRvo style is as close as I can come to theirs) It would have been wonderful to use the program to add those effects and then afterwards use the style direct on the arranger like any other style.

Also, according to the documentation they've added the same Revo drum technology that the Genos uses in that every drum note is different to the previous one.