  We numerically study some of the 3-D dynamical systems which exhibit complete
synchronisation as well as generalised synchronisation (GS) to show that these
systems can be conveniently partitioned into equivalent classes facilitating
the study of bifurcation diagrams (BDs) within each class. We demonstrate how
BDs may be helpful in assessing the robustness of GS and in predicting the
nature of the driven system by knowing the BD of driving system and vice versa.
We extend the study to include the possible GS between elements of two
different equivalent classes by taking the example of the
Rossler-driven-Lorenz-system.
