In 03 you could get an FX4 with a step bed, also all level II's have a black interior. The front tow hooks are another telltale sign, FX4 has black hooks and level II's have chrome.
also look at the size off the FX4 decal. If it is large, it is likely original. the re-pops are noticeably smaller but exact in appearance. I have seen a lot of standard 4X4 trucks that advertise as an FX4 but are not, they put the small stickers on and suddenly the 3k truck is worth 5k for nothing more than slapping on a pair of 12.00 decals.
FX4 models are truly unique for ford ranger, the one in the picture looks to be a smaller decal and it is not straight, this tells me that this is not an FX4.