Speck Smartshell vs SeeThru Cases
If anyone was wondering about the difference between Speck's newer Smartshell and their SeeThru cases, I've tried both on my 13" retina MBP and found the newer Smartshell to fit much better. The SeeThru was loose around the front edges and was particularly annoying because my palm, when resting on the laptop, would cause the case to shift back and forth. The Smartshell is allegedly 30% thiner and as a result, its presence is much less noticeable along the edge of the keyboard or around the screen, and the tabs holding the case on are more discrete. The Smartshell is also much easier to remove, which is likely the time you might accidentally break it.
I also tried a couple different colors of the satin finish, and returned both because I was bothered by the fingerprints they seemed to attract. The alternative glossy finish is still susceptible to scratches, but that seems like something I can possibly prevent, where as the greasy fingerprint smudges were prevalent and unavoidable, even though my hands are usually clean.
I initially liked the color options better available with the satin SeeThru, but the fit warranted switching to the clear glossy SmartShell. I've got Speck cases on my iPhone and iPad, so I'm usually pleased with their products. I hope this was helpful.