I had a b18c ek9 and a jdm ap1 s2000,,the s2000 is fast but it doesent feel fast, like the take off in the ek9.
Both were good cars,but i regret selling the b18 ek9,,by far its a more aggressive track ready car,especially with a b18c,unreal difference.
id Stick to your ek9 an,and b18 it,you wont be dissapointed.
Or sell it for an s2000 and you will be dissapointed,,thats my opinion.
Get a run in an s2000 1st anyways and if you know anyone with a b18,,drive it too.