Flew it a few months ago. The onboard experience is typical EK F. I think they do tend to use the older 77Ws on this route (older IFE, smaller controller etc) But the rest of the suite is generally identical to the rest of the fleet.
The worst part is the ground experience at EWR. Lounge situation is not great, as EK sends pax to the SAS lounge which was pretty crowded. Then the gate area is super cramped, making boarding a hassle.