This guys box has all of that. I forgot about the two-step, that could be nice for people without MSD ignitions. I need to clarify my previous post. I wasn't trying to list ALL the diferances between the boxes, I was just pointing out a few things that I liked on the DFI unit over the FAST unit (AC control, shift light, and 2-step). Most of the diferances are "fluff" IMO. I was hoping they would get away from that "special" $135 comunications cable.
The FAST unit has a REALLY good data logging feature that's standard. As I monkey around with the DFI, I will be able to better compare the two.
As for batch, B2B, and sequential: Unless your running 160# injectors, I haven't seen any advantage to going with a sequential box. The bank to bank is WAY better then the old DFI batch fire when it comes to idle tuning big injectors.
Like I said earlier, I am still pretty unfamiliar with the DFI box, as I learn it more, I will be able to better compare the two.
If the DFI manages to work as well as the FAST box, I will still have a FAST unit, just for the customer support. While at Bristol last weekend, I called up FAST from the track and Lance W. was willing to email me some stuff I needed to help a guy out at the track. They are willing to listen and to help their customers. That goes a LONG way with me.