I have another car with Apexi N1 Pro. I replaced the springs with Swift.
It's known that the Apexi N1 Pro are interchangeable. I'm not sure about teins. I know some about these things but I'd guess that these coilovers (the good ones

) are probably designed to work with certaing damping/rebound/compression and spring rates. I'm just guessing here but I think it makes sense. Swapping out springs is probably not good unless the coilovers allow it.
Thanks for the info. maybe you can point me to more research/discussion about this and i'll just decide to do so if Noone wants these coilovers.