No, there is no difference. Terms that are used widely for WANs are the service names like MPLS, Frame Relay, or VPN. WAN encompasses all those technologies.
Register Hereor login if you are already a member
Ethernet is a transport standard covering network interaction protocol within the network and the connectivity wiring RJ45 or Fiber.
WAN stands for wide area network and typically means connectivity to Telco equipment that connects to the Internet or private network connecting other geographically located end point.