I have never played with the Aramith Magnetic, particularly not on my home table, but I do own the other two. While CLEARLY ALL THREE are made by Aramith, my personal experience is that the Arcos II Cue ball is somehow different. It stays cleaner, longer than any other ball I own with only 1 exception. There are many debates here about whether Arcos II is just a Super Aramith Pro with special marking, or a separate "special formula". Aramith says it is same "specifications" as SAP, while Predator says it is a "unique formulation". I don't know, but I SWEAR it performs better. ALL cue balls, however, now play 2nd place to Dynasphere, whose cue balls, and balls have a finish that stays clean and pristine FAR longer than any other ball or set I have ever owned or played without regard to the "level" or cost. ALL Dynaspheres sets play and perform the same regardless of cost.