Driver-Controlled center differential vs Torque sensing center differential

Impreza WRC 2008 premium car.

I went in the tuning option in the game and saw that after buying the part, there's 2 choices for that car, "dccf" and "tscd".

Is the 1st one automatic and the second one, tunable before racing ? I like cars and all, but I'm not even close to being a rookie when it's time to talk "tuning".

Can anyone else explain the difference and which one should I choose in the game ?

Thank you.

The real car has a roller on the center console to adjust the split, and a few programmed presets. I doubt PD programmed in the various amounts of torque split for its sports mode...
Use the upgraded one, most people set it rear-biased or 50/50.

if it functions like its name says, the torque sensing should divert power to the wheel with the most grip, and the driver contorlled should lock it in at a set value like 50/50 70/30 30/70 ect.. i have the tuneable one on all my subies in the game and usually run 30/70 front to rear bias. unless im rallying then its 50/50