Difference in what way? S2000 is already an excellent car in its stock form. Would this improve cars handling? Can anyone be more specific and elaborate this?

 

You should do one or the other, the first one you will see a very noticible difference in uneven road surface handling, the second one won't seem to do anything more.

That's why the threads are so screwy in their recommendations.

 

I have a Cusco x-brace, Cusco front and rear strut bar, Cusco lower rear bar and recently purchased the Cusco bars that go along side the car, sorry forgot the name. All of them made a difference in my opinion. Car feels much more solid and feels more in control... if that makes any sense.