Exactly.. Sounds are very subjective. I've had conversations with people who prefer the piano sound of the Casio WK-1800 over the PSR-2000...... Personally I think there's no competition there and the Yamaha wins hands down, but again as stated sound quality to users is subjective

Squeak
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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.