Bitcoin Cash is a new hard fork of Bitcoin. It is supported by those who want to keep the original Bitcoin but would like to have a smaller block size. Those who oppose Bitcoin Cash launched a separate fork called Bitcoin SV. Both coins are currently battling for dominance in the cryptocurrency market.
The two currencies are similar, but they have major differences. Bitcoin is the most widely known, and has a cult-like following. It is often the first cryptocurrency that people hear about, and it has been the currency of choice for years. Bitcoin Cash, on the other hand, has problems with scalability and is a little slower than Bitcoin. Its popularity is also likely to diminish as the network ages, and it costs more to transact.