Shell is looking at the GoPro Hero 4 and wonders what the difference is between the silver and the black edition. Which one should she buy? Leo says that the black model does 30fps 4K video. It's the fastest. There are other features as well. The silver offers an LCD screen, which the black doesn't. So it really comes down to what Shell wants.
Here's a chart to give her a breakdown of all the differences of GoPro cameras and the prices for each.