It depends on your needs and goals as a borrower. Typically, the best equity loan is the one with the lowest interest rate, the fewest fees, the best fitting payment for your budget, and the lowest total of payments. If it has all that and meets your needs as well, that is the best equity loan.
Most equity loans use equity in real estate, however equity in any asset can be borrowed against. It doesn’t have to be real estate, but you can usually get the longest term with a loan against equity in real estate, which will produce the lowest monthly payment. If that is your goal then a real estate equity loan is the best for you.