PWE3 is a set of point-to-point (P2P) Layer 2 Virtual Private Network (L2VPN) technologies. Martini L2VPN is only one of the PWE3 technologies. PWE3 uses some Martini L2VPN techniques, including Label Distribution Protocol (LDP) signaling and encapsulation modes. In addition, PWE3 extends the Martini L2VPN.
PWE3 is extended Martini and has the same signaling process as Martini.