I'm aware of the Bland–Altman plot where the differences between two measures of a given parameter (obtained with two different methods) are plotted against their averages.
What I need to plot, are the differences between two measures of parameter $A$, against the difference between two measures of parameter $B$.
Both parameters are properties associated to the same physical phenomena (star clusters to be more precise, for example age and distance).
Is there a name for such a plot?
To make it more clear, this is the plot I'm producing:
where $\Delta A=A_1-A_2$. Each of those is the value of parameter $A$, obtained with a different method, i.e.: "Method 1" and "Method 2" (same for $B$).
The curves are iso-density lines, for a fitted 2D Gaussian Kernel on the data.