What really distinguish BCH from BTC? Except low fee, faster transactions and bigger block. Why do you think it is superior?
or it is just being maintained by solely deadalinx?
No.
I know Bitcoin Unlimited develop BCH full node and Bitcoin ABC develop client.
If you knew this, then why did you ask whether deadlnix was the only maintainer? Both could not simultaneously be true.
I asked it because I hear some people saying that BCH development is centralized. Just wanted some clarification.