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 (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
WB Bracketing
AE 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
Wireless
Wireless notes
Remote control
Microphone port
Headphone port
Other features
Orientation sensor
Timelapse recording
GPS
GPS notes
Samples
Videos
Summary
The Sony Alpha a5100 offers more focus points in compare with the Nikon D3300: 179 vs 11. More number of focus points means less risk of losing focus lock while tracking a moving object.
The Alpha a5100 has tilting display which will let the camera owner to capture photos from any interesting perspective. The Sony Alpha a5100 screen is better as it offers more screen dots 921,600 in comparison to 921,000 dots of the Nikon D3300 display. The higher dot count screen is better for reviewing images on your camera. The Alpha a5100 has a touch screen.
The Nikon D3300 supports external flash. It provides superior control over the exposure and lighting of the object in dim light and in bright light conditions when the photographer needs to fill-flash. The Alpha a5100 is equipped with built-in Wi-Fi which will help the photographer to transfer photos wirelessly from a camera to a laptop. The Nikon D3300 battery life is better in compare to the Sony Alpha a5100 battery life. In accordance with CIPA standards the camera owner will be able to produce 700 photos with the D3300 and only 400 with the Alpha a5100. The Alpha a5100 weighs 283g that is 147g lighter in comparison with the weight of the Nikon D3300. The Nikon D3300 can utilize optional accessory GPS devices. This feature can be useful if the camera owner is a traveller, to be able to check the photo metadata and see exactly where a picture was shot.
Considering the above differences the Sony Alpha a5100 will be the best buy. Get the lowest price on Amazon.