Take a photo and post it, STAT*! 
* Or, at your leisure.  
 
A photo didn't work too well in showing the difference, I made a video with a regular looking one (one that matches my other turbo pads and converted turbo pad) and the odd one. 
Ha! I thought the difference was going to be more drastic than the video revealed.  

 I thought it was gonna be SUPAH WHITE-GRAY. You know.
Yes, I have seen subtle variations like the one you described...plus, I've seen turbo switches with varying grays, thinner/thicker printing of text, etc.