It's extremely subjective - even when you apply objective measurements/parameters to it.
My (primitive) understanding of optics engineering is that resolution and contrast are basically a direct trade off between one another, which is to say if you enhance resolution, you must give up some contrast, and vice versa.
A rifle optic tuned for absolute peak resolution would suck, because it'd be extremely difficult to actually see what you're looking at. A rifle optic tuned for peak contrast would suck because you can't resolve what you're looking at.
So, even though each of these parameters is "measureable", what really matters to the user is what balance between the two has been struck by the designer. This is where huge subjectivity enters.
That all said, I have a Premier Heritage 5-25 and a March 3-24, and have compared them side by side a number of times. Both have excellent, but decidedly different glass.
When looking at Orange 1" Birchwood Casey target dots on white paper @ 200 yards the difference becomes evident to my shooting partner and I...
The Premier is tuned for better contrast, whereas the March is tuned for better resolution.
We could easily make out the black "cross" in the target spots with the Premier but not so much the March.
However, we could make out the 6mm bullet hole in the orange with the March, but not so much the Premier.
You'd have to see for yourself and decide if the Deon/March engineers struck a pleasing balance for your eyes.
I really like my 3-24 March, though its small objective and high magnification result in a small exit pupil at high power, making for a pretty tight eyebox...nature of the beast though.