Tyco's got a better quality rail.
Pull the rails from a piece of Tyco and Tomy track,and flex them till they break,the Tomy rail is a very soft poor quality rail compared to a Tyco.
Tyco tracks are usually classed as a high downforce track,and Tomy tracks are usually classed as low downforce.
The tyco track has more iron content in the rails than the newer tomy track. If you build a tyco track and not glue down the rails it pulls the rails up due to more pull. Tomy will not do that as easy ..
To go from one type of track to other you need to lower the car a couple tire sizes to get it to grip better.. :thumbsup: