As their similar names suggest, these two Slim Fit Cases might as well be the same product; they’re both thin, shopping mall kiosk-caliber colored snap-on shells, made in Korea, and they’re differentiated from each other only by coloration, texture, and modest differences in shape. The Gogo version has a thin stripe of additional plastic next to the volume and ringer controls; the Elago one has slightly more contoured edging on the top,…