Rpm, tunability for the computer illiterate, and it doesn't care if you lose a sensor while out in BFE. Admittedly I had to dig to get more than two, but still, there are advantages.
That Andy2 fella has a custom cam in his A pump with 2 lobes...
Maybe the more practical answer to the question at hand. Obviously not much in the way of tuning without a new cam, pump tear down, etc.. but it offers the ability to essentially have separate injection events at different timing. Maybe I am way off but this was some interesting stuff to read that more or less pertains to this thread.