The size of the sieves, the self leveling grain cleaning system, the horsepower, just the overall capacity of the small machine in the lineup. The air compressor is probably a bit much although it might be nice if a guy is working with identity preserved crops. The machine is a long way from the TR I used to run and repair daily during harvest. It does remain to be seen how well they perform when the farmer hits the field with them. But I would think they should be impressive.