I believe so I can't see why it wouldn't work it's a straight swap from STI to WRX of the same years. I'm not 100% with it being a sport but I can't see how it will have changed. Best way might be to take your cluster out and take a picture from the top of it where the cables go. Should be 3 ports As you look at it a thin one on the right big fat one in the middle and a small fat one on the right.
Actually thinking about it there is a lot more dccd, water spray, Rear diff lights they might need grounding or blanking out, I'm going to go back on that it will work but isn't a straight swap. I'm not sure how many of the lights can be removed by pulling the bulbs out without looking. but I'm going to have to say it will need some work doing on it to work. Doesn't help i'm afraid I've not seen what a Sports clock looks like. Hopefully if you pull yours out and check with these
But there is work that has to be done if it was a WRX so I'm guessing will be the same work round maybe on the sports .
But looking at some people the STI swapped over with no issue so it could be a case of trial and error :(