Unless you believe Bitcoin Cash is the original Bitcoin, then Bitcoin Cash is still less than 1 year old, and as the 4th highest behind 3 coins much older then Bitcoin Cash, this makes Bitcoin Cash the most successful cryptocurrency this year by its marketcap.
Transaction speeds of BitcoinCash are much faster than as of Bitcoin.
Lower transaction fees is another plus point for Bitcoin Cash.
I don't care which one Bitcoin Cash is called, original Bitcoin or not.
However, the coin has bring lots of profitability, advantages to community and really competitive in comparison with Bitcoin.