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
Videography notes
Microphone
Speaker
Optics & Focus
Autofocus
Manual focus
Number of focus points
Lens mount
Focal length multiplier
Digital zoom
Physical
Weight (inc. batteries)
Dimensions
Environmentally sealed
Battery
Battery details
Battery Life (CIPA)
Storage
Storage types
Storage included
Connectivity
USB
HDMI
Wireless
Wireless notes
Remote control
Microphone port
Headphone port
Other features
GPS
GPS notes
Orientation sensor
Timelapse recording
Samples
Videos
Summary
The D810 highest resolution of 7360 x 4912 pixels (36 megapixels) is better than the D4S highest resolution of 4928 x 3280 pixels (16 megapixels).
The D810 screen is better as it has more screen dots 1,229,000 in comparison to 921,000 dots of the D4S screen. The higher dot count screen is better for reviewing photos on your camera.
The D810 is equipped with built-in flash. The D4S battery life is better in compare to the D810 battery life. According to CIPA standards you will be able to produce 3020 photos with the D4S and only 1200 with the D810. The Nikon D810 weighs 980g that is 370g less than the weight of the Nikon D4S.
The D810 has 8 advantages and the D4S only 2 so the D810 is the best choice. Check the list of the best offers on Amazon.