In that case I think the correct version should probably be
BrakesEngineBrakeType( "Air_twin_pipe" ) BrakesTrainBrakeType( "EP" ) BrakesEngineControllers( "Independent, Train" )
for both passenger and freight configurations.
At the moment I think you will probably get the same result in OR with
BrakesEngineBrakeType( "Air_twin_pipe" ) BrakesTrainBrakeType( "Air_twin_pipe" ) BrakesEngineControllers( "Independent, Train" )
For that EMU or DMU power cars and any push pull cabs then it will simply be
BrakesTrainBrakeType( "EP" ) BrakesEngineControllers( "Train" )