The SPC900NC uses the ICX098BQ chip, the DMK uses the ICX098BL.
Specs for the BL
http://www.theimagingsource.com/prod...s/icx098bl.pdf
specs for the BQ
http://www.theimagingsource.com/prod...s/icx098bq.pdf
The second page of each shows the differences, essentially the Bayer matrix.
Cheers
Stuart