I have no first-hand experience, but I can say this much. First, "Hall-effect" is just the way the magnetic field triggers the spark, and it says nothing about the spark itself. Second, they are selling one distributor for all spridget applications, so it has to have a "one size fits all" advance curve. Now, the curves of, say, all 25D distributors are pretty similar, but not identical. So, among other considerations, it depends how particular you are about this.