Both these cameras- Hero4 Silver and Hero4 Black are almost of same dimensions and users can pack them inside same housing during under water shooting. If we talk about weight then the black edition is observed to be little heavier but the maximum weight difference could be just around 5 grams or below 0.2 ounces.
The GoPro Hero 4 Session is 50% smaller and 40% lighter than the rest of GoPro’s high-end Hero 4 range. This is important. That’s as much as the GoPro Hero 4 Silver, which has better specs
Capture your world in an all-new way with HERO4 Silver, the first-ever GoPro to feature a built-in touch display. Controlling the camera, framing shots and playing back content is now ultra convenient;just view, tap and swipe the screen. HERO4 Silver captures 1080p60 and 720p120 video with lifelike clarity, plus 12MP photos at a staggering 30The GoPro HERO4 Black and Silver editions can both shoot 4K and high-framerate videos. SD cards should be fast enough to keep up with the high-bitrate videos. Talking about the specifications, HERO 4 uses the UHS-I host specification. It works well with UHS-II specs also, as it is designed in a way to roll back to UHS-I. However, you will not.