What is the diff between the 3 and the CX-9 mirror base?

I posted this in the 3 forum as well.
I'm looking to upgrade to the nice rearview mirror.
I found a really cheap one that is part# 0000-8C-Z04
That is autodim with compass and homelink, with rain sensor, for a Mazda 3.
(my cx-9 has the rain sensor)
Supposedly my 08' CX-9 GT with rain sensor needs the 0000-8C-Z02 mirror (auto dim, homelink, compass, with or without rain sensor)
That mirror also fits a 2012 Mazda 3 and newer, with or without rain sensor.

Does anyone know the difference between the 0000-8C-Z04 and the 0000-8C-Z02 mirror?
Different pigtail receptable, or different mounting shape?

Thanks for any info anyone knows about this. Physically, it looks like the same mirror.
 
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