After playing with the controller for so long, you will be slower.
But that's normal, just get use to it.
You'll be going faster than before.
Much faster.
What view are you using? You definately need to use the cockpit or bumper cam view with a wheel. Otherwise, just play/experiment with it and you will definately get better, just give it some time to adjust.
I have a stock drive force that i never use due to no pedals, but i find my sensitivity to be way off, dont really feel it to be honest, and there is no resistance either.
Then again I do not have pedals for it, using the paddles as brake and accelerator, so really its not a good experience. Didn't pay for it, hence no pedals. Sticking to the DS3, till i invest in pedals or a new wheel.