Exposure latitude and DR are separate things.
That is why CineD tests both.
IMATEST is the standard way to test DR but CineD uses a higher SNR threshold.
Contrary to the claims that some people make, the Cine D test is not real world dynamic range.
It is a threshold that they felt would be more useful.
My big problem with them is that they do not test cameras at their optimal settings.
They can argue that is how people will use them in the real world but it is not how people should.
ARRI is the only brand that gets higher in the CineD tests than the claimed dynamic range.
However, ARRI has built-in noise reduction and they make it nearly impossible to choose a bad setting.
ARRI dominates and they should.
However, they are a poor choice for movies with heavy VFX.