Despite the internet providing a whole bunch of new ways to rate and compare things, the best way is still the same thing your mother and grandmother used:
https://www.consumerreports.org/appliances/dishwashers/best-...
https://www.consumerreports.org/appliances/dishwashers/best-...
Whereas I place a top premium on the dishwasher actually getting the dishes clean, and then getting them dry afterwards. Bosch does fine on the first part, but without a heated drying cycle, they're rubbish on the second part.
I will never again buy another dishwasher without a heated drying cycle.
So, yes -- use those tests and listings, but make sure you fully understand the data behind them and assign your own priorities to those attributes that you value. Because what CR values may not be the same thing that you value.