From the link that you supplied, I couldn't see much of the KKTRUE-REV part, aside from a metal part that looks suspiciously like a c. 2000 Mustang-style MAF housing, and a small one at that! The problem is that the '07+ Sport Trac doesn't use a stand-alone, pass-through MAF assembly! I also see a bellows-style connector that is usually where aftermarket intake products get their power gains. What I don't see is any separator to keep the intake charge cool, and hot engine bay air out.
In contrast, the K&N FIPK uses a precision molded plenum that's designed by computer and dyno tested and certified to make gains (or your money back). The FIPK uses the existing MAF probe, and devote a great deal of the instructions to mounting the probe properly. All FIPK connectors are flush fit to keep airflow "clean". The FIPK uses a much larger filter element, and gasketed metal heat shielding to keep the intake in cold air. It's not a completely sealed unit like the stock filter box, but OTOH that means that the FIPK can pull in more unrestricted air.
Frankly the photo of the KKTRUE-REV part looks like like the wrong photo at first glance. But after seeing all of the Explorer parts, it becomes clear that all you're getting is a shiny metal place to put the MAF probe. So what?
It would be a different story if they had flow bench numbers that might have shown that the stock intake plenum flowed well enough, like C&L did with the original 2V manifold (http://www.cnlperformance.com/plenum03.html) to show that their their "elbow" plenum made real gains. But KKTRUE-REV has no data to show. They have all of their eggs in an expensive machined aluminum MAF mount, but can't explain why it might help. No thanks!
