Also on the Subaru they aren't direct replacement struts but rather inserts, so you hack apart your stock struts and replace the inside workings with the Koni cartridge.10th Warrior said:the konis are better (at least on tarmac) but cost way more.
(It isn't just the Subaru this is true of either. A friend of mine has a 91 MR2 and his last car was a 93 RX-7. The RX-7 Konis were bolt-up, the MR2 Konis were inserts.)
Still they have a wider range of adjustment (no increments just "infinitely" variable) and would probably take a bit more abuse in the long run (but again the AGXes are $100/each!).
(I have Whiteline springs over AGXes, BTW.)