As far as I remember the "Digital" button is needed for playing back tracks to the mixer, while the "Post EQ&Dyn" button adds the Fat Channel while recording. The processed signals are sent to computer via Firewire, therefore I see no reason why Logic should not receive the processed signals. But you may want to ask this question in the closed Facebook group. There are the specialists (people using the classic mixers).
Presonus StudioLive Mixer Users