Is there measurement that correlates with cohesive/pinpoint imaging?

I am currently using single-driver Omega alnico speakers which have the most coherent imagining that I've ever heard.  However, if I wanted to compare them with other speakers (including multi-way speakers with crossovers) in that regard, are there any specific measurements to account for?  Would measured delay between driver signals in a multi-way speaker be a useful proxy?
I do know that in the same room with the same equipment, my Omega single driver speakers had a much more coherent and precise image than my Klipsch Forte IIIs and a pair of Vienna Acoustics Mozarts that I compared a little.
@djones51   Thanks for the tips about these other speakers
I have the Dutch and Dutch 8c, I never really listened to single drivers at least since the 1970's when I didn't know that's what I had. The D& D are very coherent I guess because they do the crossover in DSP. 
And the really excellent designers use science and listening and a deep love of music to move the art forward- stereo is an illusion after all. There are some excellent recordings utilizing research and products coming out of work on head transfer function - Macy Gray and Amber Rubarth come to mind - both excellent and hyper frustrating at same time. I will post LP numbers if desired....

The problem with attempting to use head transfer functions at the recording level is it requires near perfect playback setup (specific to the recording unless you are using headphones), and not something readily or even achievable in most people's playback setups. Until we substantially change the listening system away from 2 channel speakers, we are pretty stuck with that is possible though advanced DSP algorithms and controlled reflections has promise in advancing what is possible with 2 channel. Sorry, analog just is not going to cut it for those advancements.