The 3N is a wee bit smaller than the NEX-F3 it replaces.
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Flexible flash
The 3N's flash tilts back for more effective flash exposures.
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Zoom on board
The body has a zoom switch that allows the camera to operate more like a point-and-shoot for zooming when equipped with a power zoom lens.
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Self portrait
Like the F3, the 3N's LCD flips up and automatically reverses and enters self-timer mode for self-portraits. The grip is smaller than the F3's, though, which I thought was a little insufficient.
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No downward tilt
The LCD flips up but frustratingly, doesn't tilt down.
7 of 7 Lori Grunin/CNET
SD card where it belongs
Rather than inconveniently placed in a battery compartment, the SD card slot is on the side.