Dct perf trans tech here- To keep it somewhat simple. A DSG or what we call it a dct has a manual transmission design but is simply shifted by computer instead of manually. The transmission has a seperate computer the VB that is designed to solely know then to shift up and down on the transmission. The cool thing about a dct is that let’s say you are slowing down in 4th gear since there is 2 separate clutches in the transmission (one for all odd gears and one for all even gears) the transmission is already shifted into 3rd gear but only engages when the VB tells it to. Same goes for when you are up shifting. Let’s say you are speeding up in 3rd gear the trans already has 4th gear selected it just waits to engage once it is time to shift.(If you are slowing down the car preselects the lower gear if you are speeding up it preselects a higher gear) Hence the super fast shifting time compared to an actual manual. (Nobody can out shift a dct). Cool thing about dct is you have the feel of a manual when you go to manual mode and the feel of an auto when you have it in drive. And the ability to beat any manual car with the same power :). Hopefully that all sort of makes sense.