FH4 seems to have better IQ, better foliage and better texture though.
It's still missing volumetric clouds and screen space reflections on cars, but the rest of the presentation is impressive.
Great lighting too i think.
Both FH3 and especially FH4 are overall better and way more consistent, I won't argue against that. It's just that when Driveclub peaks there's nothing that compares against it, playing without HUD, only the sound of the car, overcast weather, there's just nothing like it.