[mrkurt]

They're different things. NAT64 is useful for bridging between ipv6 and ipv4 networks, it's just a way of encoding ipv4 addresses in ipv6 addresses. It's more straightforward than ipv4 nat because there's no port rewriting.

[snuxoll]

NAT64 still needs port translation, it’s doing the same job an IPv4 NAT gateway has to do, but additionally translating IPv6 addresses to IPv4 ones.

[xmichael0]

NAT64 requires port rewriting.