Is there any difference in image quality from the previous ScanSnap models?

Yes, since ScanSnap SV600 uses a contactless-scanning technology, which is entirely different from the previous ScanSnap models, the quality of scanned file is slightly different.

Comparison of image between SV600 and iX500
SV600 iX500
Color sv600_c_superfine.pdf ix500_c_superfine.pdf
Gray sv600_g_superfine.pdf ix500_g_superfine.pdf
Black & White sv600_m_superfine.pdf ix500_m_superfine.pdf

Also see the sample images for details.

Target ScanSnap:

Top of Page