The fundamental difference between the Euro/EPS and GEFS is the former reamps the Aleutian ridge (as the NAO ridge is retrograding west) pinching off the TPV and digging a new western trough southward a bit sooner. The initial trough can't separate enough, and some of the energy within it is influenced/absorbed by the new trough.
GFS/GEFS allows the initial trough to get out in front and move eastward with little to no interaction, and there is a signal for a distinct surface low moving towards the east coast.
If we are gonna get screwed (again), ofc it will be the horrid pacific that will do it lol.