The M-perf wing looks more like a spoiler. It'll change the airflow coming off of the roof to be smoother and straighten it out coming off of the rear of the car. It doesn't look like it produces any downforce, but does improve aerodynamics.
The iR racing wing is an actual downforce wing. It's positioned high up so it catches the the airflow coming off of the roof, rather than just trying to smooth it out. When made more parallel to the ground it'll act more like a spoiler, but when angled it'll create drag and the airflow coming off of the roof will push down on it.
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