^^^^
What he said. The Silver and Gold models both appear to be by the same manufacturer (Wix), as they look nearly identical inside. The coil spring stands out toward the filter outlet, something I have never seen on a champ labs filter. Both models have this, they were purchased within a week or so apart, so I'm assuming Wix currently produces both.
The only way I could tell the filters apart externally was the red ADBV on the Gold model (as opposed to black on the silver), and obviously the name on the can.
On the outside of the box, the gold model claims that the media is enhanced with glass fibers, and that the ADBV is silicone. The silver model makes none of these claims, so I assume these to be the only important differences.