the "cheap" keybed on the PSR line cant be a cost saving exercise because even the cheap MOX has a decent keybed. its not the exact same as the FSX n the Tyros/Motif Line but its still far better than the PSR keybed.
And... the MOX is a CHEAPER keyboard to buy brand new than a PSR S950.. go figure???
Yamaha PSR SX900 / MODX / Roland G70 / Roland BK9