For general discussion and not specifically tailored to OP's question but perhaps of interest to the focum:
There are usually 2 alternative loan payoff approaches suggested:
1. Pay off debts w/ highest interest first
2. Pay off smallest debt first
I have discovered a third approach, which can be of use when remaining principal amounts are similar but loan periods are widely different: pay off the one with highest monthly payment first, in order to free up the cash flow. This can help if you're living on the ragged edge, have variable income, and/or have anticipated expenses in the near future. If this turns out to be the higher interest rate loan, great. If not, you will end up paying more interest in the end, but you'll have more room to maneuver each month since your monthly liabilities will be lower.
This is only useful if remaining principal amounts are relatively similar and you can pay off either one in a short time frame (2-4 months). It won't work, for example, if you use it to decide to pay off a mortgage before paying off a car or student loan. And again it helps only with cash flow; not (necessarily) with how much interest you'll pay in the end.