As I understand it, the higher the C rating the battery normally has less internal resistance. It can give more power out quicker, giving the feeling of more punch. In aircraft I have found that a higher C rated pack produces higher overall power (watts) output, which is why most people use a wattmeter to measure the power being produced. If you are near the limit of what the speed controller )or motor) can take, a higher rated Lipo can take it over the edge. In aircraft it is normal to use a controller with a lower limit than in cars, most of mine are 40 or 60A.
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