I don't think it will. I'm not a fan of the way it looks with that tall flat front end.
Form should follow function, and for a camper a box shape is simple and gives you the maximum space.
Large radius edges added to a plain box will also give low aero resistance. That would be superior to a 45 deg angle on top of the sleeping berth. The ST HT doesn't have radiuses, but at least they added a bevel to the edges. A molded aero piece added to the nose would have been worth it if aero drag was an important consideration. It doesn't have to be fancy, just a flat nose with 6" radiused edges would be sufficient.
The bottom line is that I think it's likely fine aerodynamically compared to most similar alternatives, and the extra room in the berth will trump any esthetic misgivings.