OBD-II channels: Throttle vs. Accelerator position?? (2020 BMW M4)

Which OBD-II channel reflects pedal position?

At my last session, I (unfortunately only) captured "Throttle position" from the Fast channel feed (2020 BMW M4 / Veepeak OBDCheck BLE). The resulting data stream reflects occasional spikes, "twitchyness", and apparent delay when exiting corners. I was driving with full traction control on, so I'm wondering if the data feed reflects throttle position as controlled by both the pedal and various control systems. Either this, or my foot is doing things I don't realize (partially joking).

Config in Racechrono shows the following related channels:
FAST CHANNELS
Absolute throttle position B
Absolute throttle position C
Accelerator position
Accelerator position E
Accelerator position F

SLOW CHANNELS
Absolute throttle position B
Absolute throttle position C
Accelerator position
Accelerator position E
Accelerator position F

Can anyone explain the differences between these channels (or at least confirm which one reflects what my right foot is doing).

Thanks!

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