As stated, the inserts replace the existing inserts in your grille....the "shell" or "frame" of the grille does not come with the inserts. You take the inserts out, and replace with the new ones (attached on the back side of the grille shell).
The 2nd link is aweful, I wouldn't even consider this, looks like they are either zip tied on or glued on somehow...or, even worse, you have to drill into the grille shell to secure them.
What scheme are you planning to go with on your truck? Chrome wheels, black wheels, any other chrome trim in the future...the other accents you have, or plan to have on your truck should determine what you choose, to keep it consistent.