I really like the Beetle, but I remember face lifted mid engine Beetle as well. I would recommend using a car you would feel comfortable with. if you are not in the very top, stats of the car matter way less than the ability of the driver to drive the car.
I know that there are people who despise MR layouts. I personally like them (or at least the idea of MR cars, because of low moments of rotational inertia). I haven't driven Gr.3 as of late, but cars i would like to try for choosing as a main are the R.S.01, the 911 and the 4C, just because I like them as cars. Me being a muppet will be far more relevant to not winning than the car being META or not.
Also the Ford FORD GT LM SPEC II TEST CAT seems like the kind of nimble (read unstable) hot messes I seem to be attracted to
So don't drive a car some dudes on the internet say you must drive because it is fast. Buy the car you feel like driving, buy a few of them, and settle with the car you like driving the most.