I've driven both because I was looking into many cars before I bought the FR-S. Prefer the FR-S.. Even though I sound like a broken record but the s2000 was wayy too small for me and I just don't like convertibles and thats just my preferance. The s2000 is a marvelous car and can do the same things (if not more stock) as the fr-s. I run canyon runs with a buddy of mine who has his s2000 and we do fairly the same. Even though I seem to have gotten him on a straight line from a stop.... which I don't understand... lol maybe he wasn't giving it his all and/or I got the better jump.. Anyways just drive one. I prefer to have only one car, and I'm already set on the next car I would get as a family/DD car... a 2000 sti wagon.
