In the box, you get a USB cable, a SIM eject tool, and the phone. Depending on the model, you can enjoy either 100W (global) or 120W (Chinese) charging speeds, but you'd need to supply your own charger.
A key improvement with the Magic8 Pro is the telephoto camera. The sensor, while still a 200MP 1/1.4-inch unit, is the newer ISOCELL HP9, and it's an imager developed with zoom cameras in mind. The other improvement is the lens, now a native 85mm f/2.6 unit (up from 72mm).
Finally, in a related note, the Magic8 Pro adds a dedicated camera control button, something the Magic7 Pro didn't have. But unlike the majority of phones that use a capacitive button, the Magic8 Pro has a physical button (just like the iPhone), and it's a better implementation. The physical feedback you get is simply better than a vibration you'd receive on a competing phone.