I have just taken delivery of a replacement Orange handset and, unlike my first one, it is simlocked and heavily branded by Orange. They have their own launcher (or a skin for touch wiz?), and have redesigned the permanent icons at the bottom in orange and white and have their own widgets, nothing particularly exciting, and more preinstalled games. I later found out that there is a preinstalled Orange app called Homescreen which allows you to select Touchwiz, and then everything is back to normal, bar the Internet Icon now being orange rather than blue, which I can live with.
*#1234# shows: PDA: BVJGI, PHONE: BVJF3, CSC: ORAJG1? Is this still JF3 firmware?
The only other difference I noticed was that the Vibration icon in the drop down list has been replaced by Data, and the 3G etc indicator now displays along with WiFi, not either or as before.