i haven't read every post in this thread, however, i've had both cars within the past few months, and i can explain my experiences with both.
I had a 350bhp (uk) Nissan 200sx S14A, which was brilliant, but after two years i wanted something that could handle well and behave on track, and wouldnt try to kill me in the wet.
I swapped the nissan with a UKDM '03 EP3 CTR, as i had the offer and thought i'd give it a try. I was VERY impressed with the car. It was very comfortable on the road, brilliant road manners, went very well and was still very drivable. After 3 days of owning it, i took it on an airfield track day, and the car impressed me even more. It had a few goodies on it (Gruppe-M Intake, DC Sports exhaust, that was it), and even though it was on very cheap budget tyres, it was absolutely f****** fantastic. The balance of the car, the poise, the engine response, it was all bloody brilliant. It made sense to me what VTEC was for, as prior to that, i was very much a turbo fanboy.
I was able to thrash the car to within an inch of it's life (well, as much as my talents allowed - so the car probably had lots left to give
), and it was an absolute dream to drive on track. I was able to balance the car on the throttle, mixing oversteer with understeer with only using the throttle. In my opinion, it felt near perfect, other than a slight amount of roll which was obviously going to be present due to the comfort it gave when on the road, which was an acceptable trade-off.
In this nearly stock EP3, i was able to put down quicker times on the sprint course than a handful of DC2 ITR's, a DC5, an accord type-r, a few evos/imprezas etc. I was absolutely chuffed with it.
I already had the car up for sale as i wasn't planning on keeping it for long (wanted the money back for a house), but after only a few days i had an offer of an EK9 from a bloke up north. After sorting a deal with cash my way, i was the owner of a '97 EK9 in CW.
Now, the EK9 is completely different to the EP3, in that, if you are going to be taking clients etc about and going to business meetings (as i regularly do), then it's probably not suitable. I have a vw bora as my daily driver, so didnt care about this, hence swapping for the EK9.
The ek9 is much noisier (having little to no sound deadening), much more brash and harsh, the engine is less refined than the k20 (obviously), and everything is obviously FAR more orientated to hardcore road or track use. This was to be expected, and understandable as i dont need it every day.
After getting alot of problems on the ek9 sorted i took it again to the same airfield for another trackday, which was last weekend (almost exactly a month after doing the same thing with the EP3). The ek9 was again, absolutely brilliant, and probably better than the EP3, but not for the most obvious reasons. The ek9 was much more stable when cornering, as it's alot stiffer than the EP3, and as mentioned, power feels about the same, although the K20 does feel like it has more torque from lower down, plus the changeover is completely different.
I can safely say that i had more fun in the EP3 on the same track. this is due to the fun i had balancing the car on the throttle, being able to get the back end out with lift off oversteer, then getting straight back on the throttle to bring it into the corner where i wanted, it was almost like bloody ballet, but far more fun.
The ek9 didnt have any of this, as it wasn't needed. It got on with the job, and went round the corner, thus it was probably slightly faster than the EP3, but i can genuinely say i had more fun in the ep3, which at the end of the day, is what it's all about.
If i was in your position, i'd go for the EP3. The ek9 will be slightly quicker on track, but if you only do, say, one track day in a year, there's no question in my mind. the ep3 will do everything you want it to for daily driving activities, it'll also go very well and keep up with alot of supposedly quicker cars, it's spacious inside, feels new, is built very well, is reliable, and that gearbox is a work of art. You'll also be able to take clients and go to meetings in it without problems.
The ek9 will always be a compromise, with the very aggressive seats etc, and the fact it WILL be rattly and noisier. It's more focused, more raw, thats to be expected, there's no getting away from that.
Those people that say the EK9 is better in all areas have NOT driven both cars in the same manner, and i wouldnt be offering my opinion if i hadn't had the experience myself, within the past month or two, which is very handy for you to take into account.
I am keeping my ek9, but only because im gonna be doing shed loads of track days this year, and as such the ek9 will be a better car for that - i didn't want to jeapardise such a nice pretty new car like the ep3, as it was far too nice a car (on the road and on track) to ruin by smashing it about only on track days. As it does both very well, i felt it better to let it go to someone who didnt want something that you had to drive like you were on track every time you got into it. The ep3 would cruise just as well as it would broadside around a corner after barelling in far too quick - it's a VERY forgiving chassis (i.e it made me look much better a driver than i was, only because of how beautiful a chassis it was).
Just my 2cents - all those that are just repeating what they've heard can be quiet, unless you've driven both to death then you can't really comment.