Is Bitcoin Cash different from ‘Bitcoin’?
Yes. Bitcoin Cash is the continuation of the Bitcoin project as peer-to-peer digital cash. It is a fork of the Bitcoin blockchain ledger, with upgraded consensus rules that allow it to grow and scale.
This means that if you own Bitcoin (that is, you control your own private keys) prior to the fork on 2017 August 1 12:20 UTC, you will have the same amount of Bitcoin and Bitcoin Cash after the fork.
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Block Size Limit Increase – Bitcoin Cash provides an immediate increase of the block size limit to 8MB.
Replay and Wipeout Protection – Should two chains persist, Bitcoin Cash minimizes user disruption, and permits safe and peaceful coexistence of the two chains, with replay and wipeout protection.
New Transaction Type – As part of the replay protection technology, Bitcoin Cash introduces a new transaction type with additional benefits such as input value signing for improved hardware wallet security, and elimination of the quadratic hashing problem.
Bitcoin Cash will have support from various members of the cryptocurrency industry including miners, exchanges, and clients like Bitcoin ABC, Unlimited, and Classic will also be assisting the project. In addition to this help, Bitcoin Cash developers have added a ‘slow’ mining difficulty reduction algorithm just in case there’s not enough hashrate to support the chain.
SOURCE
https://medium.com/@jimmysong/bitcoin-cash-what-you-need-to-know-c25df28995cf