It's a box on wheels that gets seven people from point a to point b. The screens help stupify the kids in the back to make the journey quieter for the adults in the front. Nobody is shopping by zero-sixty times, the maintenance intervals are all about the same, and they all fit roughly the same amount of stuff.
The most differentiation you're likely to find is that one or two will fit a sheet of plywood in the back, which is admittedly a pretty fringe thing to differentiate on, and frequently only matters to the second owner who is a tradesperson who doesn't want a full-sized van and doesn't mind a few stains from the kids who used to ride around in the back eating their breakfasts.
Ironically, the Honda Odyssey used to be differentiated by having regular doors in the back instead of sliding doors. They clearly decided that that wasn't an advantageous differentiator, and went to sliding doors after just four years.
I agree. That is why my original thesis was that Hondas are now uninspiring, undifferentiated and boring. Pretty much minivans are all those things, by default.
source: I own a 2017 odyssey, and friend to many other minivan owners