Hi David12
From what Garth (of Musical Surroundings) had told me, I understand the hierarchy to be as follows....
Benz LPS
Benz LP Ebony
Benz Ruby3 (Ruby 3 is basically the same construction using non-ferrous coil formers, but uses different wood body...preferences made to the Ebony body.)
Benz Ebony, Ebony TR, Ebony H are all three basically the same cartridges but each designed to be mated with the various different types of phono stages or step up transformers that individuals may use.
Benz Wood SL, Wood SM, Wood SH are the same as the Ebony, Ebony TR, and Ebony H but uses the Bruyere Wood vs. the Ebony Wood bodies.
I hope this helps.