Putting the math to one side, it seems to myself, when a SUT is reported as being used/intended to be used, as a Standalone Device to amplify the Current/Signal produced in the Cart's Coils. The idea of using the SUT tranx's built into a Standalone Unit, receives much more discussion about Pro's/Con's or Preferred/Not Preferred, than the similar designed Tranx' types being a component used as a part on a circuit within a Phonostage to produce a MC Input.
I can't recollect seeing any commentary that makes a criticism of a Tranx' used as a component on a circuit within a Phonostage.
Does this not suggest?, that the Additional RCA Connectors and required additional Pair of Cables are the main focus of the 'anti's' when commenting on SUT Tranx's being used to amplify a current/signal.