IMO, every chassis is a racing chassis, as long as it runs another chassis of the same creed. It's fun to race AW against original Aurora... for the Pancake 500. The skill level of the driver is more important I think.
The super duper serious racers seem to love their heavily magnetized lexan bullets and their routed tracks.
If you're a newbie, a less expensive magnet chassis might be better suited for you too, less de-slotting.
Later you may find, as some here have, that the magnets are better suited for sticking your kid's artwork to the refrig. I like both styles, but there's something about sliding through a turn that magnet cars can't give you.
That's what makes this hobby so cool, there's a chassis and racing class for everyone.