It seems pretty clear what the differences are. F is using a different file format. Choose your favourite. S is an option whether or not to use a notch filter. This is because it is common for EEG signals to have 50 Hz or 60 Hz line noise that needs to be removed. But the fact that your bandpass filter is from 8-30 Hz indicates you're interested in the alpha and beta frequency bands, which kind of hints that you're past the preprocessing stage when line noise should have been removed.
One of the first steps for preprocessing your EEG signal is to use a bandpass filter, typically a 4th order butterworth from 1-150 Hz, (assuming a sampling rate of at least 300). Then perform a notch filter around the line noise and its harmonics. Only then could you start extracting specific frequency bands.
