==PlayCity: Partially compatible==
The Play2CPC offers 3 more audio channels onboard, as opposed to the PlayCity which offers 6 more audio channels onboard. The few programs using 9ch AY will be not replayed, because it was not on the PlayCity base spec.
The Play2CPC does not have a CTC chip, as opposed to the PlayCity which includes a CTC chip. The Play2CPC use the default configuration of most of the PlayCity programs, like ALCON 2020.
The Play2CPC is equipped with an OPN3 (ymf288) soundchip. It offers 6 FM chans and 3 PSG chans.
Thé PlayCity is equipped with 2 PSG chips offering a total of 6 PSG chans but no FM chans.
So the few PlayCity programs using 9ch AY will be not replayed by the Play2CPC.
Also, programs using the FM capabilities of the Play2CPC will not be replayed on the PlayCity.
==Dandanator: Not compatible==