Yamaha have announced a V2.0 OS for the Montage series. The new OS adds Motif patch compatibilitiy so you can now load Motif patches, as well as numerous workflow and control assignement tweaks.
The OS 2.0 is a free download available via YamahaSynth.com
Developments for Korg's instrument have been slow but promising.
Older Music Machines & the People Who Still Use Them