This is only an interpretation, because I have only shot with both lenses for some days, but read a lot. Tune in, please, if something wrong: Nikon 14-24: The sharpest WA ever. Fantastic. Sharp alleready from f. 2.8 and stopped just a little down sharp corner to corner Huge and heavy Prone to flare/ghosting - you can work around it, but you have to do that and you are not shure, that you can everytime. Can not wear filters. Nikon 17-35 Sharp, but not from f/2.8, and generel not as sharp as the 14-24, but as sharp as the 14-24 at 20mm and f/8.0, also in the corners, and maybe also at other settings stopped down ? Can use filters Lighter and easier to travel with NOT prone to flare/ghosting and good for backlighting - in fact fantastic "feature" for at wide angle for landscapes.