Hi Folks, I don't know if anyone has done the comparison but here is my take on the Kato Unitrack and Atlas True-Track. Both are molded track and are of high quality with realistic ballasted track including integrated nickel silver rail. The Kato is a dark gray while the Atlas is a light tan. Both go together and come apart easily with out breaking allowing temporary layouts to be built and designed. The Kato track uses code 80 weight rail that is compatible with standard code 80 snap track through the use of a Kato converter track. The Atlas true-track uses lighter code 65 weight rail and transition to cod 55 or code 80 requires a bit of work but is able to be done. Both Kato and Atlas will accept low profile wheels and also the older standard flange wheels such as the Micro-Trains Pizza cutters. This is important if your loco roster contains many older locos. The Kato and Atlas track pieces are not interchangeable (easily) Track joiners on the Kato track are removable and replaceable. The track joiners on the Atlas True-track are part of the roadbed and not removable. The rail joiners on the Kato track are part of the track joiner, the rail joiner on the True-Track is a separate piece just as on the atlas standard track. I have included several pictures to show the two side by side.