I think an easier LFS vs RL comparison than circuit racing is autocross. I am totally certain that on a real life circuit I would be afraid of pushing as hard as I do in LFS (for good reason!!), but assuming you have an autocross course with no obstacles nearby, there is no reason not to push as hard as you would in autocross in LFS.
One thing I notice myself doing in my stock miata in autox is a quick initial input to get the car transitioned and then a second, larger input once it is settled in a turn. I find myself doing this in LFS also when driving a car with soft suspension. In real life and in LFS, as soon as I am driving a car with a stiffer suspension setup (ie. a CSP Miata in RL) I no longer do this two-stage input, if you want to call it that. In the time it takes to make that first input, the car is settled.
I do notice a lot of similarities with my driving style in real life and LFS, and I think it's nice to be able to make that comparison. As for similarities in how it feels to drive in LFS and real life, given similar cars, that's another discussion...however I've autox'd cars in RL very similar to the XFG, XRG, XRT, RB4, FXO, FZ5, and XRR, and been impressed with the similarities between characteristics of all of the LFS and RL cars.