You probably haven't gotten any responses because it sounds like you've already decided what you want to buy. Between the Frontier and the Equator? Depends on whether you can find any of the latter, and how long you'll hold onto it. Not long? Get the Nissan, you'll have an easier time selling it and get more for it. Driving it until the ground? Might as well save a few bucks with the Suzuki.
One other variable: the Equator originally had a 5/60 basic warranty and 10/100 powertrain warranty, longest transferable warranty in the industry. Now that Suzuki dealers are gone, though, I don't know if the warranty is still being honored, or if so how.