So for what its worth, here's my observation between the two.
Lyman (left) is better at cleaning, Frankford (right) is better at polishing.
I can clean both out and put fresh media of the same kind in both and within two cycles the Lyman media looks dirty and the Frankford media still looks about like new.
Brass from the Lyman is cleaner, but dull.
Brass from the Frankford has more grime left on it, but what is clean is much shinier.
Notice how much the Lyman churns the brass. The Frankford the brass pretty much sits in the bottom of the hopper and never cycles around to the top.
Lyman (left) is better at cleaning, Frankford (right) is better at polishing.
I can clean both out and put fresh media of the same kind in both and within two cycles the Lyman media looks dirty and the Frankford media still looks about like new.
Brass from the Lyman is cleaner, but dull.
Brass from the Frankford has more grime left on it, but what is clean is much shinier.
Notice how much the Lyman churns the brass. The Frankford the brass pretty much sits in the bottom of the hopper and never cycles around to the top.