hi,
ZF7982 & ZF7372 are both dual band concurrent AP's,
By default whether in a standalone mode or controller mode, both AP's are configured for concurrent 2.4GHz and 5GHz operation.
60 is a max number for concurrent VOIP client supported on ZF7982 so roughly 30 on each radio.
If there is no VOIP and security then ZF7982 can easily handle 80% to 90% of numbers advertised. I don't have proof however i have seen it handle then well.
hope this help.