By far, the G1000 is the better unit..it has 76 semi weighted keys..the EM2000 has 61 synth feel[not bad, but the G1000 is superior]..
The screen seems to hold up better on the G1000 than the EM2000..I have had problems with 3 different EM2000' pixels, and never on the G1000's..

The G1000 has a couple more dedicated buttons and sliders for realtime control..The G1000 also has a physical A/B midi ins..outs and thrus..the EM2000 has a soft route[menu driven]..
Sound engines are identical..64 voice polyphony, with the best allocation in the business..
About the Zip drives not being durable...nonsense..most of the time a problem arises..it is human error[owners not knowing the correct procedure for saving and loading files]..

As an example..My G1000 is 9 years old.. I replaced the Zip drive last year, because I purchased a new back up drive, that was sitting on the shelf for two years and figured I should go ahead and use it..

As with everything ..take care of the keyboard and it will last..

The EM2000 will give you speakers, if that is important...not at all important to me..I can't hear them on stage with vocal monitors sharing the stage..

In my opinion not only is the G1000 better than the EM2000..but to me better than any other board I have owned..and that includes many newer models..