When are you going? The only flight to Hongkong, post 3/25, which will have Global First is UA 895 ORD-HKG. You can use the Polaris Lounge in ORD which is very nice but I'd rather not detour for a lounge. EWR-HKG is a 2 class plane with 2-2-2 layout and the nonstop saves quite a few hours. SFO-HKG is still the 747 until March 24th at which point the new 77W comes on line with the new Polaris seats which seem pretty sweet - but if you are in business nothing to upgrade to.
Adam