Additionally to this:
I went from a g27 to a fanatec 2.5 and the biggest differences are:
- each sim feels completely different now and the sliders and settings really change the feel
- I feel understeer in all of them perfectly clear
I don't use the enhanced understeer effect as I understand it as just a drop in the overall ffb when the slip angle/ratio goes above a certain amount.
In rf2 and in ac without the effect, this drop happens naturally while coming from the physics. It's clearly there with the fanatec wheel. With the g27 it was a bit difficult to spot but also there!
In raceroom however... With the fanatec now I can really feel each 5% of the understeer slider. At 0% the ffb stays at the same level even when completely overturning the wheel. Very strange at first. At higher percentages the drop in the ffb is clearly happening.
This was kinda strange for me as it means that raceroom is not "canned effect" but instead separated that physics channel somehow into that slider.
Anyway, I have it at 35% now which feels similar to ac and rF2.
And further on the topic: rF2 was strange for me for the first 20 hours or something. Then I started to feel the tyres instead of "just a spongy feeling". And it's true. You feel this tyre flexing and adapting under load a little more pronounced in rf2 compared to all other sims. You have to get your hands to actually understand it though!
Give it a chance and maybe try to feel the understeer in R3E with the slider at only 35% and in ac without the enhanced understeer.
My old real life Mercedes c class has a very spongy behavior and is understeery as heck. Did some driver safety training with it a while ago and I can tell you: you don't really feel understeer!
The wheel becomes a little "dead" but not really much lighter. But you see how the car goes "more straight" although you are turning further.
For me with that specific car it was more a visual thing to spot (and a bit of seat of pants ofc) rather than a thing to actually feel in the wheel.
In the sims (if you disable look to apex options (real head motion for AC, look ahead in rf2 iirc) you'll be able to see understeer happening while at the same time your wheel will become a bit "dead", losing its springiness and progressively increasing resistance versus turning.
Just try to feel it that way and give it a chance. If not just ignore rF2