As we don't have ALL-I codec available in GH5 yet, maybe we could take a look at how those two perform in GH4. Here are a couple of links that help understanding the state of the affairs. 1. A recommendation on how to configure GH4 to get the maximum quality for the video from SuggestionOfMovement authors: https://suggestionofmotion.com/blog/panasonic-gh4-setup-compression-methods/ 2. A discussion on the same topic at EOSHD forum: http://www.eoshd.com/comments/topic/6340-gh4-100-mbs-better-than-200-mbs/ Of course it is planned to have 200/400 Mbps in GH5 for FHD/4K respectively, which is more than it is for GH4, but we can still try to think a bit about the image quality we may get with the update for GH5.