You also have to take production cost into consideration here as well. I can only imagine the difference in cost between Roland's high end Organ.., and the E80/G70.

Cases like this aren't apples and oranges. It's more the difference of apples and potatos!
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.