I have scoured the internets, called my parts dept, who transferred me to service, who transferred me to parts, who....and then I called MazdaUSA. No one has been able to tell me. I would like to know the difference btw the 06-10 and the 12+, but the closest I got was from the woman at MazdaUSA who said "the rear suspensions are different between the models, so the springs are different and not interchangeable"
I'll need to see that with my own eyes, TY.