It's true that, at the moment, Bitcoin Cash is much faster and easier to transact - but this is true of many, many altcoins. Take Verge, for instance. It is extremely cheap to transact and is faster than Bitcoin Cash (and much, MUCH cheaper to buy into right now).

Bitcoin Core - the original Bitcoin - has a huge development team. Even if you just buy Bitcoin to get all the free forked coins you will receive over the next number of years, it's worthwhile. Bitcoin Cash simply will not be able to keep up with the development of Bitcoin Core in the long run.

For now, Bitcoin Cash certainly has the edge. This is temporary.