[dns-wg] v6 ns/glue naming bcp

is there any operational considerations before putting both A and AAAA records on a name used glue? or, should one use separate names for v4 and v6 transport? e.g.: example.com. NS ns1.example.com. NS ns2.example.com. ns1.example.com. A 192.0.2.1 AAAA dead:beef::1 ns2.example.com. A 192.0.2.2 AAAA dead:beef::2 vs example.com. NS ns1.example.com. NS ns1.ipv6.example.com. NS ns2.example.com. NS ns2.ipv6.example.com. ns1.example.com. A 192.0.2.1 ns1.ipv6.example.com. AAAA dead:beef::1 ns2.example.com. A 192.0.2.2 ns2.ipv6.example.com. AAAA dead:beef::2 yours, jakob