Considering the purchase of a 2006 2388 with 265 rotor hours. I can't see a difference between it and a new 2588. I was told that the bubble up auger is different for the hopper topper but looked the same to me. Also the final drives are supposed to be heavier on 25 due to factory hopper topper. The 2388 has a hopper topper on it. Is that true? The dealer wants $40000 more for the 25. Worth it?