Distributor ?

Im looking at Mancini's website and they sell basically two different vacume advanced electrical distributors; the Mopar brand and the "Mancini" brand. Besides $45, what is the difference between these two? Anybody use the Mancini one? (MRE-6992)

The Mopar Performance one has a Mallory advance mechanisom in it that allows you to adjust the mechanical advance as well as the vacuum advance.

Not sure about the Mancini unit.