I think is more then 10bhp difference but the difference is with turbo you have like instant kick when you press the throttle, without is bit calmer, easier in my
Opinion.
I'm on ds3 so, for me is definitely easier to drive without the turbo!
No need for instant kick, the tyres can't take it instantly, we are using low accel LSD for the very reason that even without turbo there is oversteer in the low range, so there is no need to agrevate that by adding turbo.