I do`nt know the differences in the rotors so I`l comment on the rest of the thread.
I always believ that My pickup came OE with Delco tune up components and so I try to keep it that way.It may not be the most inexpensive way but it is the right way.After all,how many miles does them plug wires run,80,000,70,000 I do`nt know so I try changing out the plug wires every other set of plugs and I have had no issues ever,with bad plug wires.
A good indicator of how much resistance is down line from the dist. cap is to look at the upper inside of the cap and at the top of the rotor,how much black sooty looking stuff is it collected,quite a lot ? then it may be in need of plugs and wires.sometimes I have even seen them rotors where they were burnt,caused from an overload of resistance from extremely bad plug wires.