The Japanese have a Special Range (SR) derivative which is more capable weight-wise and has a high density seating (think charter layout) for busy Japanese Domestic routes. The only market in the world to offer them, I believe. However you are correct, I believe they are wing tip-less.

However, the 747-400F (Freight) has the wing tip, however no extended upper deck instead looks very reminiscent of the early -100 having only a few windows on the upper deck.

The hump also contributes to the 747-400 being one of the fastest Long Haul aircraft - something about a suction effect directly behind the hump on the roof of the aicraft.....