Okay, the clear one I ordered came today. Here are some pictures and my impressions.
The thickness of the skin is same all over; slightly thinner than the body of the two-tone ones available everywhere.
On the two-tone ones the top is like an extra layer, which makes it pretty thick. The A button is about level with the skin and the +/-/home/etc buttons are recessed quite far below the top of the skin, which can make them hard to press at times.
These are thinner, so the A button is still proud of the skin. The +/-/home/etc buttons are now even with the skin and easier to push.
The silicone feels exactly the same as the two-tone skins, and it's nice to have the same feel on the nunchuck, even though I doubt you'd need the grip. Either I'm getting better at putting them on, or these were easier to slide on than the two-tone ones, probably because they're a little stretchier due to the thinness.
Enough of the talk, below are some pictures, both on and off the wiimote. It would probably be easier to see what I'm talking about with a colored skin, but I actually like how the clear one looks, it keeps the white Wii look going.
They look exactly the same as the ones available at Fry's for 6.99 and at Gamestop under their house brand (for 9.99 I think?). My guess is that they're all exactly the same, just being rebranded.