I went back and watched Don's OSPF for IPv6 configuration show and he uses the command:
#ipv6 router ospf 1
In the new CCNA (2018) show this command is used:
#router ospfv3 1
Looking at the command line there is also the difference in that one shows (config-rtr) and the other shows (config-router).
My question is....do these commands perform the same task (initializing OSPF), and does the same format need to be consistent across the neighboring OSPF routers. Does Cisco have a preference?