First Guess: Neither Accel nor MSD "make" those distributors. They "import" them from the same Communist nation that build the junk parts the competitors sell. Possibly made in the same factories, just packaged in different boxes.Accel and MSD both make aftermarket versions of the TBI and MPFI big block distributor. Myself, I would pay for the MSD as their distributors are built to handle the high output spark of the MSD ignition boxes.
https://www.amazon.com/MSD-Ignition...Y1KAX2JTJDW&psc=1&refRID=2HP7XQ03RY1KAX2JTJDW
There was a time when the MSD "Street Fire" line was intended to be the bottom-feeder, mass-market, low-cost alternative to the 'real" MSD line of products. Unfortunately, much of the "real" MSD product catalog is made in China now. All of that is crap.
There's something wrong with your vehicle. I ran MSD spark boxes on multiple vehicles, from a Honda Civic, Dodge Slant 6, SBC Tri-Power 400, and my '88 5.7L K1500 among others, and never had a problem with "burning through" OEM and aftermarket rotors, caps, wires, etc.It got sooooo tired of burning through the rotor of a stock HEI on my MSD equiped crew cab.
Your plug gap is too wide, or the rotor-to-cap gap is too wide, your plug wires have failed (High resistance) or (on the older, coil-in-cap distributors) you need a low-resistance "button" between the coil and the cap.