Yamaha GC1 vs DGC1

[sepehrz]

I have searched the web but I could not find an answer to this question:
What is the difference between the Yamaha GC1 and DGC1?

I am looking at a pre-owned piano. On the piano itself it says GC1 but on the player under the piano it says GP Disklavier Model DGC1. Which model piano is this?

Thanks for your help.