There is no difference between BCC and BCH as far as I have read, exchanges had to call them different things because of existing tickers.
That just seems confusing.
The difference in some exchange is due to BCC ticker is an old altcoin so which ever exchange it is trading they have given the bitcoin cash another short name that is BCH. both are same. But due to this where so many users have bought BCC which is actually not bitcoin cash coin,