The ME80 is a classic anologsynth. In addition to the features on a Yamaha CS80 the ME80 will give you:
Patch memory for 128 patches.
Group presets for each synthline and equalizer.
You can select highpass/lowpass for each filer.
You can change the sine wave into a triangle with adjustable harmonics.
You can change the square wave into a saw.
The saw can be made double with adjustable detuning.
Delay and reverb
EQ page with 2 graphic equalizers and distortion section between the equalizers.
Selectable mono, 8, 12, 16 and 24 voice polypony, and selectable 0-8 voices unison with detune knob.
Drift page with sliders for random tuning of each voicecards every time you hit a note and LFO for slow drift movements.