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
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
Remote control
Other features
Orientation sensor
Timelapse recording
GPS
GPS notes
Samples
Videos
Summary
The D300 highest resolution of 4288 x 2848 pixels (12 megapixels) is better than the D200 highest resolution of 3872 x 2592 pixels (10 megapixels). The D300 has a wider ISO range of 200-3200 than 100-1600 ISO range of the D200. This ISO range let you to produce better photos in low light situations. The D300 provides more presets of white balance - 12. It gives the photographer more control over colour.
The Nikon D300 is produced with tilting display which will let the photographer to take amazing selfie photos. The D300 display is better as it has more screen dots 922,000 in compare to 230,000 dots of the D200 screen. The higher dot count display is better for reviewing pictures on your camera. The Nikon D300 supports a very convenient live view feature which allows you to use the display as a larger viewfinder.
The D200 weighs 920g which is 5g lighter than the weight of the Nikon D300.
Considering the above differences the D300 will become the best buy. Check the lowest price on Amazon.