More differences. Less synth parameters in ND3. (WHY Nord, Why!?!?)
In the Tone section:
Dyn Timbre / Timbre is now Dyn Filter / Freq
No more Punch / Hi Decay
In the Noise section:
No more Attack/Rate or Envelope mode.
So it looks like the ND2 is like the Nord Lead 3.
Older, but a more complete synth.