Well I can only speak for Zeal, as I have not used Smiths Photochromatic lens. If you aren't happy with them, definitely contact Smith. Any good company logs and appreciates feedback like this. If there's a problem, they'll eventually catch on but the sooner people speak up the quicker they can identify it and fix it.
Here's a video I found that kind of shows the change for a pair of Zeals.
Photochromatic, Polarized & Spherical Goggles by Zeal Optics - YouTube
Watch the whole thing or skip to the 50 second mark for a better comparison.