What is the difference between Bitcoin and Bitcoin Cash?

How is Bitcoin Cash different than Bitcoin?
Bitcoin Cash was created as an answer to the years-long debate among the Bitcoin community regarding the best way to scale Bitcoin to more users. The most simple solution, and the one adopted by Bitcoin Cash, is to increase the Max Blocksize Limit parameter of the Bitcoin codebase. While Bitcoin’s block size limit remains at one megabyte (allowing for ~250,000 transactions per day), Bitcoin Cash has increased the limit to 8MB, allowing for around two million transactions to be processed per day.
As far as the users of Bitcoin/Bitcoin Cash are concerned there is very little noticeable difference on the frontend when using either currency. The main difference between these coins is the fact that, given equal hashrate, BCC protocol allows for more transactions per second which translates to faster payments and lower fees.

Should I use Bitcoin Cash?
Whether you decide to use Bitcoin Cash or not is entirely up to you. While Bitcoin currently has a larger network and supporting infrastructure, many are dismayed by the ever-increasing fees and long transaction times.
Bitcoin Cash offers lower fees and a more reliable rate of transaction than Bitcoin.
In terms of development, most of the code for Bitcoin Cash is the exact same as Bitcoin’s. This makes developing software or altering existing software to support Bitcoin Cash quite simple.