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
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
Other features
Orientation sensor
GPS
GPS notes
Timelapse recording
Samples
Videos
Summary
The D750 maximum resolution of 6016 x 4016 pixels (24 megapixels) is better in comparison with the D3 maximum resolution of 4256 x 2832 pixels (12 megapixels). The D750 offers a wider ISO range of 100-12800 than 100-25600 ISO range of the D3. Such ISO range let the camera owner to capture good quality photos in more difficult conditions.
The D750 is equipped with tilting display which will let the camera owner to capture photos from any interesting angle. The D750 screen is better as it offers more number of screen dots 1,229,000 in comparison to 922,000 dots of the D3 screen. The higher dot count screen is better for reviewing images on your camera.
The D750 weighs 750g that is 550g lighter in comparison with the weight of the D3.
Taking into account the above-mentioned differences the Nikon D750 will become the best choice. Get the lowest price on Amazon.