Just order a set of the i25 irons after hitting them during a fitting session ( yellow, + 1/4", D1 swingweight). Sweet feeling and forgiving club. As stated above not much difference from the i20 but a big leap from my i10's. I really like the compact heads of the short irons and just they way they set behind the ball.
Also got to hit the new i25 driver, sets up nice and feels great but I like my g25 better. I did not think I would like the new strips but they are hardly noticeable, they stand out more in the pictures.
Ken