MC I agree with all the above and here is my input to your questions.
Q.1. Are the styles the same from the G1000/EM2000 style library or complete new styles.
A. A lot of the styles are the same but with added new styles, see answer to question 2

Q.2. Are the voices also similar to other Roland or have they improved them.
A. All the voices of the G1000\EM2000 are on the VA models plus a completely new Bank of improved patches. These give even the existing styles a new edge.

Q,3. does it still come with the ZIP Drive and the 400+ styles on the ZIP disk.
A. Yes,

Q.4. Is this keyboard so different from the G1000/EM2000 that I would have to run out and buy one or am I throwing my money away on a "little better" Roland EM2000.
A. Owning an EM2000 myself and playing a friends VA7 every week, I am not personally tempted to pay the extra for the VA7. I have thought about keeping my EM and adding possibly a PSR2000 to it.

Graham UK