do a google search. that doesnt look like the isf spoiler at all to me. ur question is very simple and could have been answered by doing a quick image search of an isf... use the more obvious resources before posting, just a small peice of advice
I think your spoiler is closer to an ISF than some people think.
It does resemble mine, but hard to tell from the picture. The F-sport one is definately more agressive than the IS F and partially cuts out around the logo on the back of the car. The F-Sport also has a more pronounced lip than the ISF.
If I had to make a judgement call from those pictures, I would say yes...what you have is pretty close.