Question about DSC Off 4WD Sport

Was trying some launches. Seems like when holding the DSC button, it defaults to standard 4WD when DSC flips off. I see that in M settings you can program DSC off with 4WD Sport, but is there any way to do this manually without dedicating an M button to it?

Also, what’s better for launch...4WD or 4WD Sport?

Thanks