PerTronix Ignitor I vs PerTronix Ignitor II

So, I am thinking about getting a PerTronix ignition for the '63 Dart GT. It has the 225.
Summit Racing has both the Ignitor I (1361A) and Ignitor II (91361A) listed (https://www.summitracing.com/search...963/make/dodge/model/dart?N=400428+4294926252).
What really is the difference between the two? Is it worth the extra $42 to get the Ignitor II? I am going to guess that with either, I am also going to have to upgrade the coil, wires, plugs and distributor cap?