While stateful and stateless NAT64 perform the task of translating IPv4 packets into IPv6 packets and vice versa, there are important differences. The following table provides a high-level overview of the most relevant differences.
Differences Between Stateless NAT64 and Stateful NAT64
No conservation of IPv4 address
Conserves IPv4 address
Assures end-to-end address transparency and scalability
Uses address overloading, hence lacks in end-to-end address transparency
No state or bindings created on the translation
State or bindings are created on every unique translation