•Historically, the ECMWF is the 'better' model.
•The ECMWF correctly predicted the 2011 October snowstorm.
•The ECMWF was the 1st model to catch onto the idea of what become the 2011 Groundhog Day Blizzard (Source).
•The GFS is run 4 times a day, while the ECMWF is run twice.
•The ECMWF is based overseas in Europe.
For those wondering how I determined the ECMWF is historically the 'better' model, take a look below.
Now, whether this storm happens remains to be seen. But I personally find it awfully convincing with the ECMWF/ECMWF Ensembles lined up for a strong storm system for the Northeast against the less-dominant GFS.