I shouldn't really talk about cars handling, as I'm such a noob.....did I say that already ?!?!?
Anyway, yesterday I drove all day long with my lovely Raceabout (...in LFS, that is!), and I must say it's definetely not one of the grippiest ones, but I nearly never lost control, and consistently shaved my (louzy) PB on BL1. In my early "LFS days" RAC was just a no-go.
As others have said, it depends very much on setups, but also on understanding and "feeling" the mass of each car, which is not very easily achieved sitting in our armchairs...
It also depends on foot "weight", or pressure. RAC (for example) has its own sweet spot where the accelerator should be for any given turn, otherwise...spin-fest time!
Just something to consider. Of course the original poster has waaaaaay more RL driving experience than me, and I have nothing to teach him.