"Higher" grade RCMs may have more powerful motors that allow more lps to be cleaned per session. Better ventilation or fan to facilitate cooling of said motor....
Ability of the platter to rotate in both directions. Speed variation (faster for fluid application and slower for vacuuming)
All these "should" help clean your lps better. How much better? VFM? Diminishing returns? Ahhhh... only you can decide that.
Is your collection still growing at a fast/alarming rate? What you buying? Flea store/Fleabay or new vinyl?
Ability of the platter to rotate in both directions. Speed variation (faster for fluid application and slower for vacuuming)
All these "should" help clean your lps better. How much better? VFM? Diminishing returns? Ahhhh... only you can decide that.
Is your collection still growing at a fast/alarming rate? What you buying? Flea store/Fleabay or new vinyl?