Rikki do you really think the inside sampling quality layers of the sounds is the same between the two units?
There is a reason for the price difference.

Tone Generating Technology Genos

AWM Stereo Sampling, AEM technology
Polyphony Number of Polyphony (Max.)
256 (max.) (128 for Preset Voice + 128 for Expansion Voice)
Preset Number of Voices
1,652 Voices + 58 Drum/SFX Kits
Featured Voices 10 Revo! Drums/SFX, 76 Ensemble, 390 Super Articulation!, 75 Super Articulation2!, 82 MegaVoice, 40 Sweet!,
81 Cool!, 160 Live!, 24 Organ Flutes!