With the exception of the hot shoe bump -- though somehow the RX100 II and RX100 are the same height -- the camera looks the same from the front. It's got the same lens as well.
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The controls are the same as the RX100's, too.
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Tilting LCD
One of the features I miss most on the RX100 is a tilting LCD.
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The RX100 II adds Sony's Multi-Interface hot shoe, which can be used to add an electronic viewfinder or microphone as well as an off-camera flash.