Main
Model
Price
Advantages
launch
Announced
Body type
Camera subcategory
Sensor
Effective pixels
Max resolution
Sensor size
Sensor type
Processor
Image ratio w:h
Other resolutions
Sensor photo detectors
Image
ISO
Boosted ISO (minimum)
Boosted ISO (maximum)
White balance presets
Custom white balance
Image stabilization
Uncompressed format
JPEG quality levels
Photography features
Minimum shutter speed
Maximum shutter speed
Aperture priority
Shutter priority
Manual exposure mode
Subject / scene modes
Built-in flash
Flash range
External flash
Flash modes
Continuous drive
Self-timer
Metering modes
Exposure compensation
AE Bracketing
WB Bracketing
Screen / viewfinder
Articulated LCD
Screen size
Screen dots
Touch screen
Screen type
Live view
Viewfinder type
Viewfinder coverage
Viewfinder magnification
Videography features
Resolutions
File Format
Microphone
Speaker
Videography notes
Optics & Focus
Autofocus
Digital zoom
Manual focus
Number of focus points
Lens mount
Focal length multiplier
Physical
Weight (inc. batteries)
Dimensions
Environmentally sealed
Battery
Battery details
Battery Life (CIPA)
Storage
Storage types
Connectivity
USB
HDMI
Microphone port
Headphone port
Wireless
Remote control
Wireless notes
Other features
Orientation sensor
GPS
GPS notes
Samples
Videos
Summary
The D810 highest resolution of 7360 x 4912 pixels (36 megapixels) is better than the D750 highest resolution of 6016 x 4016 pixels (24 megapixels).
The Nikon D750 is equipped with tilting LCD that will let the photographer to make photos from any odd perspective.
The Nikon D750 is produced with built-in Wi-Fi that will help the camera owner to transfer pictures quick and easy. The D750 battery life is better in compare to the D810 battery life. According to CIPA standards the photographer will be able to produce 1230 photos with the D750 and only 1200 with the D810. The Nikon D750 weighs 750g that is 230g lighter than the weight of the Nikon D810.
Considering the above differences the D750 is the best choice. Get the lowest price on Amazon.