ICAO has adopted the terminology EDTO, but accepts that some authorities still choose to use the old term ETOPS. EASA & FAA are the two big players that still use the term ETOPS. Both EDTO & ETOPS are basically referring to the same thing. Page 11 explains.
http://www.icao.int/SAM/Documents/20...%93Summary.pdf
The main thing with EDTO is that three & four engine aircraft are now included in the requirements.