It's a noble idea but I think it may be a waste of your time and money. If the criteria for determining if an ESC is good or bad is how much power the motor it's hooked up to makes, they are all the same.

The reason they are all the same is two factors. First, they all have near-zero internal resistance, the second is that at full throttle an ESC is effectively an analog system, there is no drive frequency to consider, when the sensor says the motor is at the correct angle, it energizes the winding, then when it clicks over the next 120 degrees it clicks off. Things like drive frequency are part-throttle only.

You can select an ESC based on other features, or a higher capacity one if you want to race modified.