What's the difference between adjusting a photo's exposure versus its brightness?
I created a virtual copy of a photo. The original's exposure was increased 1 stop. The other got an increase in brightness from 50 to 100.
Flipping back and forth between the photos, the photos appear to be almost identical and their histograms are almost the same. The colors are the same, except for a very small difference in brighter blues on the photo that saw increased exposure. Side by side, you probably wouldn't be able to find differences, but very small differences are noticeable when you quickly flip the images back and forth.