The 9.7 seems to have many more features.. I can see why the 12.9ers would be pi55ed! and a 1/3rd less weight. i think it has to be the best all round iPad right now. PC replacement - still not feeling it.
- Live Photos
- Autofocus with Focus Pixels
- True Tone flash
- Panorama (up to 63 megapixels)
- Auto HDR for photos
- Sapphire crystal lens cover
- Improved local tone mapping
- Improved noise reduction
- 4K video
- Slo-mo video support for 1080p at 120 fps and 720p at 240 fps
- Cinematic video stabilisation
- 5 megapixel photos
- Retina Flash
- More LTE bands
Probably charges much faster too.