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
Storage included
Connectivity
USB
HDMI
Microphone port
Headphone port
Wireless
Remote control
Wireless notes
Other features
Orientation sensor
GPS
GPS notes
Timelapse recording
Samples
Videos
Summary
The Nikon D750 highest resolution of 6016 x 4016 pixels (24 megapixels) is better than the D4S highest resolution of 4928 x 3280 pixels (16 megapixels).
The D750 has tilting LCD that will let you to shoot high quality selfie photos. The Nikon D750 display is better as it offers more number of screen dots 1,229,000 in comparison to 921,000 dots of the D4S display. The higher dot count display is better for reviewing photos on your camera.
The Nikon D750 is equipped with built-in flash. The D750 is produced with built-in Wi-Fi that will help you to transfer pictures quick and easy. The D4S battery life is better than the Nikon D750 battery life. According to CIPA standards you will be able to take 3020 photos with the D4S and only 1230 with the D750. The D750 weighs 750g that is 600g lighter than the weight of the Nikon D4S.
Considering the above differences the D750 becomes the best buy. Get the list of the best offers on Amazon.