I think I see a picture emerging here. Both NADP1 and 2 are acceptable at many airports in Europe, but they have noise monitoring stations and will fine you regardless of whether or not you are following the allowed profiles. So noisy airplanes have to fly a more conservative profile than quiet ones.
Anyone have the noise abatement plate for EDDF that specifies 1500'? Is it in the general info or noise abatement section?