In my drag car I ran several different systems. Stock with chrome box, Jacobs system with stock distributor, Crane system, MSD system. All of them started right up, idled clean, and there was no appreciable difference in e.t. or m.p.h. The Crane and MSD did have some extra options that made them kind of nice like start retard, rev control, and nitrous retard compatibility. I have not tried any of the new stuff from the last decade.

The MSD E-Cruve distributors look interesting for the simplicity of dialing in the advance. Of course this can also be done with a stock unit, but it does take a little bit of an effort if you need more or less mechanical advance than what is already built into the OEM dizzy.

Bottom line is most systems are going to be very comparable in performance. Examine if there are additional capability you want with your system and then find one that provides it within a budget you want.