It is hard to say. We all know how BCH is manipulated. But we also know how manipulation in this world works unfortunately. However, I think it will be very difficult to beat BTC, it is too popular and many believe in the technology behind it. I have learned that you never know what will happen in the future and so the best thing is to prepare yourself to the best of this eventuality
Yeah it seems that bitcoin cash is being manipulated by the whales while bitcoin is a long standing and well known digital currency and it has been through many tough years on the market but it was lately adapted by masses of people. In my own opinion both of them is Good but I think bitcoin will always stand on the top of cryptocurrency markets.