I recently received the GoPro Hero4 Session camera and wanted to compare it to the GoPro Hero4 Black and Sony 4K Action Cam I already owned. I plan on producing a full review of the GoPro Hero4 Session camera soon. For now, take a look at the side by side comparison of each of these camera’s images. Without even zooming in, you can see the difference in quality. The GoPro Hero4 Black blows past the GoPro Hero4 Session and the Sony 4K Action Cam.