That is correct George. The EAR-Yoshino circuits themselves are single-ended, the transformers are just to provide balanced connections, as is standard in recording studios, where Tim does a lot of work (Roger Waters’/Pink Floyd’s studio in England being one such).
Roger Modjeski provides a balanced input (only) on his Music Reference RM-200 amplifier, but he told me he did that with discrete components, not transformers. The RM-200 is also a single-ended circuit.
Ralph Karsten’s Atma-Sphere designs are true dual-differential balanced circuits, as far as I know unique amongst currently-available tube amps and pre-amps.
I believe it is Ralph’s contention that balanced circuits themselves provide benefits over single-ended, Tim and Roger that balanced transmission is what they find of significant value, not the circuit itself. About that I may be mistaken ;-) --- Eric.