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.
this is why i am not in team cash.. but yes i also detest core. .. many people cannot see the big picture of the whole ecosystem to see beyond the 2 team drama of finger pointing.
the end result though.
bitcoin core WILL NOT have LN as its sole feature to rival other currencies.
bitcoin core really will need to decide to do something to the core protocol that adds something that other currencies do not have.
bitcoin core will need to step back and publicly announce that they will never again use a 'mandatory dated consensus bypass' upgrade
bitcoin core will need to work as a level playing field, allowing other nodes to use consensus. no bilateral split, no REKT campaigns