Nikon D700 and Nikon D90 are two types of camera produced by Nikon. Nikon D700 is the successor of D90. There are differences between Nikon D7800 and Nikon D90.
The major difference between them is the sensor resolution in which the sensor resolution in D700 is higher than that of D90; this sensor resolution is the cause of the sharp images with appropriate details that occur in D700.when it comes to the ISO ranger, D700 is larger than D90. The D700 has a continuous shooting rate than D90.
When it comes to shooting, D700 can shot 108p movies while the D90 can only shoot 720P. When it comes to the memory card slot, the D700 has a dual-slot for memory card, while D90 has only one. Lastly, D700 is made out of magnesium alloy, while D90, on the other hand, is not made of magnesium alloy.