Here's an appropriate comparison

 

Nice comparison shot, might have just made my decision for me on springs. What made you choose Eibach over Tein's?

 

Edit: Thanks! The Tein Springs, to my knowledge, were originally made for a VQ35 (correct me if I'm wrong). That lead me to believe the info about it being "soft" springs is true. I figured they wouldn't last long on our VQ37 because of the added weight. I decided to go with the Eibachs instead and am happy with the end result. Should've gotten the sways together but I will acquire that in the future.

 

If you can tell the difference you need to be a professional race car driver. There is ~200 lbs difference and more than that in a convertible. Last long? How long?

 

I can't tell the difference. I am only stating the fact that the G35 is lighter than the G37. It would be cool to be a pro race car driver tho...on the weekends lol. And I never said anything about knowing how long the Teins last. I'm only assuming they don't last as long as Eibachs and am going with the info I've read about them before I made my purchase with Eibach.