mattiasc02 said:
Now, I got that image, cropped and rotated, and have both versions:

cropped:
exporting it at 85 and exporting it at 100

There is no difference in quality within the image itself. However, there IS a difference in file size and the jpeg number. But that don't mean jack shit, is my point.
Here are this differences highlighted. Mattias, you need to get a better monitor or something, the differences in quality are obvious.

Edit: that being said I think even the "original" from twitter has an unacceptable level of artifacting.