The difference between a METAR (SPECI) and a MET REPORT (local SPECIAL REPORT) is the following:-
1. A METAR (SPECI) is an Aerodrome Routine Meteorological Report Routine Meteorological that is disseminated in meteorological code
2. A Met REPORT (local SPECIAL REPORT) is a Local Routine Meteorological Report that is disseminated in abbreviated plain language.