p10 vs. b14 suspension...

my buddy has a b14 and he was wondering if the suspension is the same. He ordered a set of ksports and he thinks they are too stiff *** his car is crazy light. So I talked to ksport, didnt exactly get a clear answer so I wanted to know from the direct source. I had a customer order ksports from me on his p10 and he got a set of 5kg (280lbs.) spring rate for his rear. Are the springs the same on the p10 vs. b14? height? diameter? etc.

thanx in advance...

I would think its similar. And if you got coilovers, why would it make a big difference? I would just figure a good spring rate more

length or diameter of spring may change on different applications