Does anyone know exactly the differance between these 2 settings, I think it might be the assisted braking?

When you press the DSC button, you turn DSC off, but Traction control still there.

When you hold DSC button for 7 seconds, it turns both of them OFF.

Use it only if you're on a track. Cuz if you use it on the streets and u hit somebody and they for some reason *found out* that you turn those off, they can probably sue you.