How does modern ST 70 compare to RogueCM, Primaluna similarssound?

I haven't heard the other amps you listed, but own a Latino ST-70 with KT66 power tubes. If there are any specific questions you have on it, I'm happy to help.

I did replace a restored, original Dynaco ST-70 with the Latino design, and can tell you it's a lot less "vintage syrup" than the original. Cleaner, more separation and detail.

This may interest you: https://www.theabsolutesound.com/articles/dynaco-st-70-series-3-tube-power-amplifier/  One of the original ST-70's greatest weaknesses, was it's power supply.    In this latest iteration; that's been well addressed.