Well I can answer this question well, since I sold my ek9 and bought a 98 dc2 integra type r.
In interior, and cosmetic the ek9 is better than the dc2. The dc2 has the advantage that it has a 1800cc engine, and stock vrs. stock, the dc2 can beat the ek9 in almost every aspect.
The ek9 has better handling, stock vrs. stock, Also keep in mind that both vehicles weight almost the same, also the 96 spec model itr is lighter than a ek9.
I bought a dc2 because I bought the car for track only use, and this car had roll cage and a log goodies, I didn't had the money to build a track only ek9, thats why I bought the dc2.
So in conclusion, stock vrs stock, the dc2 is faster, but the ek9 looks and handles better.
And for daily driver, I'll go for the ek9, is fast, beautiful and it does consume less fuel than a dc2.
They're bullet proof if you take good care of them, you need to do always their service in time, and use good oil.