Bitcoin Cash (BCC)/BCH is a hard forked version of the original Bitcoin. It is similar to bitcoin with regards to its protocol; Proof of Work SHA-256 hashing, 21,000,000 supply, same block times and reward system. However, two main differences are the block size limits, as of August 2017 Bitcoin has a 1MB block size limit whereas (BCC)/BCH proposes 8MB blocks.

Also, (BCC)/BCH will adjust the difficulty every 6 blocks as opposed to 2016 blocks as with Bitcoin.