It's missing one of the dots on the top front in comparison to the S4; dunno which sensor that is.
#1 Indicator light illuminates with a series of distinct colors and flashing colors to indicate different notifications and status. Events include charging, low battery and missed event. Powering on = blue blinks/animates.
Battery charging = red remains on
Battery fully charged = green remains on
Low battery or charging error = red blinks/animates
Missed notification (call or messaging) blue blinks/animates
#2 Light (RGB) sensor lets you use ambient light level to adjust the screen brightness/contrast
#9 Front facing camera allows you to take pictures while facing the screen and allows you to video conference
#10 Gestures sensor used to detect AIR VIEW and AIR GESTURE motions
#11 Proximity sensor detects how close an object is to the surface of the screen. This typically used to detect when your face is pressed up against the screen, such as during a phone call. While talking on the phone, the sensor detects talk activity and locks the keypad to prevent accidental key presses.
On the Galaxy Note 3, there are only 3 visible sensors that I can identify. This is what I was inquiring about.