The HV (high voltage) subsystem on the /9s is far more complicated due to reinstating the dual voltage capability.
It's not High Voltage in spite of what AdTranz and BR think. The IEC define what high voltage is and the 319/769/768 only very really slightly sneaks into it at 1056V AC on the main rectifier when in AC mode and with 27.5kV on the OLE.
Most "High Voltage" is in fact not, it's Low Voltage and
should be referred to as either "Unprotected Traction Supply", "Traction Supply" or "Traction Auxiliary Supply" depending on the loads and protective device characteristics.
And in reality the former two are not
that much more complicated than a 769/0 or /4.
I am of course excluding cables on the actual HV side of the main transformer.
EDIT:
The only part that is actually high voltage at any time is the main transformer secondary on S1, S2 and S3 until the main rectifier, then it would be rectified (assuming perfect rectification on zero load) to 1493V, so by that logic, the "HV" system, what little of it there is, is exactly the same on all Class 319 derivatives.