[Mitch58]

I have a couple of each. The Ninco handle the best of the group. In the photos the red and black are Nincos, the blue one is a Monogram. you can see how it sits a bit higher than the Black Ninco. I also have a Scalextric but even after extensive tuning it is nowhere near the other cars.
  I also have two early Scalextrics there are rear motored. they run decent but as they have the old SCX type motor they are not very fast, but great looking cars.
I also have another Monogram with a 3D printed chassis and a Slot It pod. It does run very well, but that is not what you were asking about.