John is right about the theory. There is a principle called Paschen's law that would govern, but I am not a physicist or mathematician. Sadly, we would probably need a working Ouija board to find an authoritative answer on BCF (it's the sort of thing our friend TR3 Driver would have known). I have never found the air gap between rotor tip and plug wire tower to create a problem in practice on any engine. In any event, the spark (potential energy) applied by the coil wire to the center of the rotor, as a practical matter, has to go to ground somewhere. Absent a defect in the cap or plastic body of the rotor (like a crack or carbon track), any distance within the distributor from the rotor electrode to any ground other than the plug presents many times greater resistance than the rotor to plug wire tower air gap ever could. I think that the difference between the caps you are looking at is either promotional only or is an implicit statement by the seller that they are stuck with a group of defective caps. BTW, if you Google "high compression distributor cap", you will get zero relevant hits.
Bob