There are no big differences between bitcoincash and bitcoin. so if bitcoin kills, higher quality projects such as ethereum rise to first place.
There are huge differences... BCash is the tool of a criminal who doesn't mind using lies, propaganda and other illegal tactics to try and increase his wealth.
And if I may add, Bitcoin has the full backing of many investors and this community. So I guess that enough to say that they have difference. The support for bitcoin is overwhelming, but bitcoin cash has to react lies, and spread fears against bitcoin so that people will shift to them. Sadly though its not happening that's why that so called flippening didn't materialized but instead they sunk deeper.