I think the markets will decide in due time. My gut tells me "Bitcoin" will be "Bitcoin" but Bitcoin cash will have some value for some time.
YES, will have the same value for some time, one day later, one week later, one year later or one hundred year later. OK come to buy BCC you wil earn the same value of bitcoin one day later.
That's never going to happen, nearly everyone is planning to dump bitcoin cash and futures put its value only around $300 or so. I'm pretty sure it will start around that price and crash down below $100 and miners will stop supporting it.