I do not have any good media yet for the Phantom 3 but I will provide it as soon as I can. From everything I can gather, the Phantom 3 advanced is basically the Inspire 1 without retractable landing gear for 1/3 of the cost. It has the HD downlink called lightbridge, buttons on the remote for taking a picture and starting / stopping video, 4k @ 30fps from the very same camera that is on the Inspire 1. Anyone who flies like I do is now questioning what the point of the Inspire 1 is - I would rather own 2 Phantom 3's and have 6 batteries than one Inspire 1. For drone shots of surfing and other action sports, you could cut the cost down even more because you would want to film at 60 fps.
The speeds for ascent and descent are slightly improved from the Phantom 2 at 5 m/s up and 3 m/s down (the Phantom 2 is 4 / 2). This is the only area where the Inspire really stands out - it is faster.
The Phantom 3 also has a 4 cell battery which is actually a solid improvement over the 3 cell Phantom 2, however all of your Phantom 2 batteries will not work with your new copter.
You also can't fly the Phantom 3 with the two man setup like the Inspire 1.
If you have been waiting to make a purchase, I can easily recommend the Phantom 3 over the 2 and the Inspire 1. If you are going to use this mainly for real estate photography and stationary stuff, I would recommend the advanced version. If you are going to be filming fast moving subjects only, you could easily get away with the regular version that is only $999 because the only difference is the ability to film in 4k@30 and fast moving subjects don't look good at such a slow frame rate. The cheaper version films in 1080p @ 60fps which is great for action stuff.
The Inspire 1 also has a removable camera that *might* make it able to survive one round of upgrades from DJI but if history is a guide the Inspire 1 will be obsolete before we get the option to purchase a new over priced camera for it.
Bottom line lesson here, stick with the Phantom line for affordability and features!!