There are few Inspire - Phantom 3 comparisons:
http://myfirstdrone.com/tutorials/buying-guides/dji-phantom-3-vs-inspire-1/
http://djiphantom2vision-plus.com/dji-phantom-3-vs-inspire-1/
and specs comparison at official DJI forum:
http://forum.dji.com/thread-11677-1-1.html
Just Google it ;)