can anyone tell me if EK9 CTR springs are the same as on DC2 ITR? Are they interchangeable?

I have springs for a CTR and wondering if I can use them on the ITR. Is the height in springs the same? and will they fit?

 

different spring rates.

EK9 is a lighter chassis so the spring rate will be lower on that car compared to the spring rate of a DC2.

puttin the ek9 one on the dc2, will be a downgrade in performance.

 

They're actually Spoon Sports Progressive springs. The Spoon catalog shows the EK and DC as having the same spring rates. The only difference is in the drop. EK is 20mm and DC is 30mm. Just wondering if the drop difference is due to the setup iof the suspension rather than just the spring. And if so then can i just use the EK springs on the DC?