Thats not really the same at all because the question with net neutrality revolves around being charged for the content of the data. No one is proposing congestion pricing which charges you based on the content of your vehicle.
Carpool lanes, different tolls for commercial vs personal. I think these are essentially doing that.
Or a car with a "banker cargo" vs a "barista cargo". When I take a toll road, it is with full knowledge of what my time is worth, and that most people can't justify it.