Two differences I see in the advertised longwave pattern between the EPS and GEFS beyond the mid month period: EPS keeps some semblance of a -WPO(ridge) while the GEFS loses it, and EPS has a little better look in the NA, although not ideal. This keeps the the Pacific flow somewhat at bay, and allows the east coast to remain on the cooler side. Something to monitor going forward.
(I would have used the WB GEFS, but as usual WB always sucks in some way and its not available atm).