the AFX rotor has the same bars as a specialty rotor but the performance is better in greener crops that the grain is dry but the stems are green. In wheat & beans you'll see alot of difference. The old drive by the seat of your pants is no more. They improved the crop flow with the impellors on the AFX, as for the bolt on's from other companies I've had no expeince with them. Most of my customers go with the AFX when their old rotor needs rebuiding cause all the bars & labor is about half of the AFX rotor, but if your no-tilling you would like a chopper on your machine because the AFX rotor is so gentle on the crop that it comes out the same lenght you cut it. Hope this helps, talk to your CIH dealer & they can help you with what way you would like to go.