The DJI Mavic Pro is a very small and lightweight drone. It's easy to toss into a backpack along with other gear, to capture footage while backpacking, etc. The DJI Phantom offers superior video detail and video stability in my opinion but one is likely more likely to leave a larger DJI Phantom at home!
The DJI Mavic Pro is the first small and foldable drone from DJI. Although I like the DJI Mavic Pro, there are definitely areas for improvement. It's the first of its kind and has not been around for many years like the proven and thoroughly-tested DJI Phantom platform. My experience with the DJI Mavic Pro