IMHO, trying to make the lanes equal is a waste of time. All the reasons already mentioned should be enough, but also how often will you have two precisely equal cars AND drivers racing against each other? Usually one or the other is just a little better, and will be the winner no matter which lane they are in. If you design a lane to be handicapped, then you'll always put the better driver in that lane, and it will be UNfair. You can tweak voltage per lane, but then you're spending more time tweaking than just racing, and it's still more of a handicapping technique than a fairness one. Besides, it's next to impossible to make any track truly equal between lanes, and so you almost always rotate/trade lanes and run again to determine the real winner.
I say, just make the track design you like, don't worry about equal lanes, and rotate lanes as needed to even things out. At least then, you know it's the best driver winning, and not the best lane. And if you provide the cars, or otherwise leave the car in its own lane, so that drivers also drive both cars, and provide controllers as well, then you know it's not the lane, the car, or the controller, but just the trigger finger of the racers determining the winner.
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I say, just make the track design you like, don't worry about equal lanes, and rotate lanes as needed to even things out. At least then, you know it's the best driver winning, and not the best lane. And if you provide the cars, or otherwise leave the car in its own lane, so that drivers also drive both cars, and provide controllers as well, then you know it's not the lane, the car, or the controller, but just the trigger finger of the racers determining the winner.
