I think he meant that the HFi 2400 was identical to the HFi 2200. The PRO 2900 is DEFINITELY NOT identical to the lower end HFi 2400. I was just wondering if the PRO 2500 and the 2900 were practically the same... just like how the HFi 2400 and the HFi 2200 are the same.
The 2500 is not the same as the 2900 and the 750 is not the same as the 900.
On a side note, if you consider the 2500 let me just say those velour pads are the most uncomfortable pads I have ever tried. I seriously wanted to kill myself. If you can't handle Grado pads forget about it.