A video of the Page R sequence, WESTEND.RS, off of the WESTEND.IMD floppy image, being run through the current work-in-progress Fairlight CMI IIx driver in MAME. Other than the missing Curtis SSM2045 filtering, no discernible differences compared to reference footage from real hardware.
Since the well-sourced Wikipedia article on West End Girls doesn't mention the Fairlight CMI, it's not 100% clear as to why this disk, which purportedly was used by Pet Shop Boys, would have existed. However, it's known that PSB used a Fairlight CMI III in some live performances - it stands to reason that the CMI IIx may have also been used in earlier years. This sequence combined with string pads on an E-mu Emulator II would have comprised the majority of the instrument track in the event of a live performance, so it's a reasonable enough theory.