Actually, two teams working at the same time have less time to talk about their games, maybe one or two points about graphics, but about GRAPHICS, or technical data, not the history, not the theories in the game, not the actions in them. Theories and technical development are completely different things.

Take out the development things like 3D graphics, music, anything that has noting to do with the history in the videogame, because those things are based around the technology of the time in videogames.

Anyways, the Chrono team have been working in the space-time theories since Chrono Trigger, four years before FFVIII.

Hironobu Sakaguchi, producer of a lot of square games, father of the Final Fantasy series, and one of the co-founders of Square Co., participated in FFVIII AND in Chrono Trigger, but NOT in Chrono Cross. Sakaguchi, also, loves to work with different theories and situations in his games, as everyone can see, but Chrono Cross was developed to continue on the Chrono series, not the Final Fantasy ones. Maybe FFVIII has something to do with the theories managed in Chrono Trigger, but they are Theories that everyone can use for anything, even fan fiction.