Forza HUB image quality > downloaded image quality

Yesterday I noticed that the picture I took in the photoeditor had better quality than the one I saved on my computer. It downloaded as a jpg file. When sharing the image via email, I got a bmp file, which was better
But the one in the forza hub still has the best quality…
Does anyone know how to get the original file?

So here is the comparison between the 2 images: Comparison - Album on Imgur

The one on the left is sharper. And apparently the bmp file is not really a bmp file, because when I transferred the image to my windows 7 computer, it gave me the message that it’s a wrong extension file name, and if you let it rename it, it transforms to jpg…