Will it be Bitcoin with its Layer Two solutions such as the Lightning Network and Sidechains?
Or Bitcoin Cash with its on-chain scaling solutions by increasing the block size limit?
when you look at things in this perspective you can see that bitcoin can always implement the "block size increase" solution anytime we wanted in the future and have that side of bitcoin cash. but bitcoin cash can never implement SegWit and Lightning Network because if it does then they will be negating the first and only reason they forked off which was because they said 1) no changes like SegWit 2) scaling should only be done on-chain. if you break your only reason for existence then you should not even exist.
in short if BCH implements SegWit and LN even if they call it something else and mask it in different ways, BCH price will drop down hard because the little number of believes they have will dump it and go away.