Real question, Bitcoin cash does it all and better with a stronger backing. Why Litecoin?
Maybe the meaning of your question is Bitcoin cash better than Litecoin?
Bitcoin cash and Litecoin have a lot in common, they are the hard shell of Bitcoin, BCH and LTC share the same codebase, and they have the ability to scale effectively. Plus BCH and LTC are in the 10 largest cryptocurrencies by market cap. The main objective is to fulfill the need for virtual currency with low fees and the fast confirmation time.
Bitcoin Cash and Litecoin have their respective advantages and disadvantages, but both are cryptocurrencies. So they are very dependent on the development of the crypto market, If the demand for digital payments increases, most likely these two coins will also increase in value.