Waterproofing is important to consider if you'll be recording footage underwater or even around water. Some waterproof cameras can go deeper than others, and some have built-in waterproofing so that you don't need to think about extra housing. And if you're already invested in a system, like GoPro, which uses a proprietary mount, then sticking with what you've got can help save money on extra accessories.
The W300 does have GPS, Bluetooth, and Wi-Fi connectivity for seamless smartphone connectivity. The rest of its highlights include a 3-inch LCD display and a quartet of environmental sensors whose data you can add to your images. They include a barometer, a compass, a built-in depth gauge, and a thermometer. Nikon offers the camera in black, yellow, and orange.