Can someone tell me exactly the differences between the effects on both of these units?

I know the harmaony is more upto date on the VoiceLive2

Is the reverb updated/better?
Is the pitch correction algorithm updated/better?
Has the mic pre section been updated/better?
Are the presets the same?

If anyone else has a question to compare these 2 models, maybe worthwhile putting a post here too...

cheers