If you have not you should read the article below which should answer your question. Short answer: The Masseto is a better choice, and has a SUT built in to it.
Like the version of the Aurieges I tried last month, the Masseto is a full-function preamplifier, with line and phono stages under one roof. The Masseto goes a step further, providing a switchable choice between moving-magnet and moving-coil phono inputs, the latter accomplished with an onboard pair of amorphous-core step-up transformers.
The Masseto didn’t just play music better than the Shindo Aurieges: It sounded better, too. The more expensive preamp had a distinctly wider frequency range, no doubt because of its lower output impedance. And while I didn’t expect the stunningly low noise floor of the Aurieges to be bettered so soon, the Masseto did just that: It was even quieter, darker, and deeper between the notes—and, as with its less expensive brother, I simply could not get the Masseto’s phono section to hum.