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.
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.