Storm is obvoulsy more powerful she can in current form and way more power in her best form(emotion consumed). Polaris is only second to magneto with the power of magnetokinesis because their are very few that have that power. But she is at equal levels with storm when it cmes to electromagnetic waves. Polaris would lose this fight because though she is powerful she isn't metion by marvel in the top mutants like storm or magneto. As a matter of fact Storm has been recently said that she is beyond the level of even magneto and sheild and the us government agrees with her so polaris would be no match. So storm 9/10