[s-cars] 94/93 S4 sedan/avant springs/shocks

[Sam Clarkson]

Hi all iv'e had a 94 S4 6speed sedan for a few months now. The other  
day a 93 S4 avant 6 speed came up, so i bought it! Ok it goes like  
this... The suspension on the sedan is far better than the soggy muck  
on the wagon( something to do with new Boge shocks I beleive). I want  
to swap them before selling the sedan. I know the front end will be  
the same and that the rears will interchange, but are they the same??  
I have pulled the rears and dimensioally the springs are identical.  
The sedan springs have a paint code 1 yellow 3 blue, the wagon 1  
orange 1 green. The coils are the same guage wire, the same overall  
diameter and the same number of windings. So how can they differ?  
Avants generally have heavier springs but aren't "sport" springs  
heavier anyway. Anyone know the paint codes?
TIA
Sam