The only "improvement" bcash has on bitcoin is that it has an 8mb block size. Well bitbean has 20mb blocks so is bitbean then the REAL bitcoin @rogerkver ? $
8mb it's not the only "improvement", it's BCH's major advantage because it makes it cheap, reliable and usable.
Other coins with big blocks have not the same user base as BTC - basically, BCH is copy of BTC without BTC's limitations.