Marketing...
They where probably low on stock on the s970 and instead of building another stack of s970, they must have tought lets release a slightly update s970 to sail on the Genos hype.(that was huge at the moment of release)
I agree a parts surplus sell off scenario....
A trickled down MOTL Genos will certainly be a hit in the near future imo.
I doubt it...
There never was a motl Tyros, was there? Most things, like the keybed, the bigger movable screen, sa2 voices and more never made it to the psr series, did it?