The PF50T has a gain control on the preamp, and a master volume control on the output section. The DIs on the F50T are tapped off the signal at the secondary of the output transformer, and also at the preamp. The preamp DI can be selected to be pre, or post eq. I don't think that this will provide the capability to have an overdriven signal on one, and a clean signal on the other.
From the PF 50T manual:
16. POST-EQ/PRE-EQ: The signal at
the preamp out can be set to either Pre-EQ or Post-EQ with this switch. With the switch in the IN position,
the signal at the preamp out is Pre-EQ. This is a direct output not affected
by any EQ or boost settings. With the switch in the OUT position, the signal is Post-EQ and is controlled and modified by the tone controls.
17. PREAMP OUT: This signal may be used to feed an external power amplifier, mixing console, interface or house PA system.
The lift/gnd switch [18] is available to reduce any noise that may occur.
18. LIFT / GND: When this switch is engaged, it connects the ground connection to help reduce residual hum and buzz sometimes picked up in the signal cables.
19. TRANSFORMER BAL OUT: This signal may be used to feed an external power amplifier, mixing console, interface or house PA system.