Holley sniper vs. Edelbrock pro flo

I would not sweat the sequential injection as its not a noticeable factor, "...In the end, there are no significant differences in top end, wide open throttle, horsepower between batch fired and timed systems..." it was more for low RPM test emissions. Its a moot point after about 3.5K anyway as the valves are going to be faster than the sequential injection pulse cycle. I have an original $$ Pro-flow 2 channel bank fire V1.0 and the thing came with a questionair on what cam specs you were going to use. If you were not using their matched Performer RPM camshaft:
you had to send the GM'ish EPROM in (1 X free) to have it burned to your cam specs. the 2nd gen V2.0 (came out 6 months later!) had the ability to write to its own EPROM from the same handheld controller, that had less flexibility in the first gen model. I had the Edy RPM cam anyway so I never got it changed but will have to do a global fuel pressure change as its not a 360 anymore :-)