Originally posted by Lisztman:
No no no, the M0# series is their newest creation. [...]These are about $1000 cheaper than the normal Motif ES series.
As compared to the ES's, the MO's have a different keybed, no sampling, and are capable of twice the number of performances (256).
If you don't know about it already, check out the motifator.com website. There's lots of info on the various models, and forums dedicated to the Motif line.