When it comes to speed and price for Bitcoin vs Bitcoin Cash, Bitcoin Cash has an advantage over Bitcoin. It is becoming extremely popular among users and has been increasing in value even since its introduction. But like Bitcoin, it has its share of problems. The increased block size could have a centralizing effect and reduce the attack resistance of the network. Bitcoin hasnt been around for long, so well have to wait until it sees more daily transactions to find out if that will actually happen.
So in comparing Bitcoin vs Bitcoin Cash, the truth is Bitcoin Cash is not better or worse than Bitcoin. Its just different. The two can co-exist on the market, along with many other cryptocurrencies including Ripple and Ethereum, to name a few. But the important thing to remember is that despite having similar names, they are two entirely separate currencies.
Some many coins have faster transaction times than Bitcoin and other 'benefits' but they have not come close to overtaking Bitcoin. The only benefit I see that those behind Bitcoin Cash could have been that they will have equal coins (btc/bch) after the fork effectively doubling their money for a short period before Bitcoin Cash price dropped.