The main differences are:
bitcoin will have the Lightning Network
bitcoin is more popular and have a bigger marketcap than Bitcoin Cash
will ever be cheap do onchain transactions on bitcoin cash
This is a good explanation.
In terms of price and support, bitcoin is supported and accepted a lot more than bitcoin cash. In fact, the introduction of bitcoin cash raised the price of bitcoin because people (when they got their bitcoin cash), dumped their BCH and bought BTC. Since the high of bitcoin cash being released, bitcoin cash has never reached a similar high point. If you're looking at investing, it makes more sense to invest in bitcoin.