Disclaimer
Tests are done by scientific method of trying to control all variables in the best possible way, and then applying average function on those results to control inherent randomness.
But, due to system having many changing variables, some variables will be given in these tests. Please, be aware that if you use different variables, your results will vary, and they might be different.
I'll try to explain which variables might have higher impact on test results.
You should test with your own variables to establish test results that will be the most similar to results you will get. Different stats do affect heroes and how good they are!!!
Interpreting results
Chart shows percentage of remaining units. The numbers are from perspective of what is tested, and description should be read from left to right, or from main test subject perspective. If number is positive, left side hero, or combination of heroes, or whatever test subject is, has won. If number is negative, left side hero, or combination of heroes, or whatever test subject is, has lost.
Higher numbers are better, you want to have more units left after battle, or if you lose, that opponent has less units.