The feed accelerator is the same, concaves look exactly the same though i have never put an older one in a new machine if that makes any sense. Sieves, elevators, blah blah never changed. The bullet machines did have a re-designed air scoop which kept the engine bay and rad a lot cleaner, they also had a the 9 liter engine whereas the one you have has an 8.1. IMO the 8.1 is actually better on fuel. Apart from that, the same combine virtually.
Out of interest, how many hours on it and what have they got it listed at? Is it a 96, 97 or 98?