APPLE HIG
I learned that there can be subtle differences between designs that are very difficult to notice and only the best designer are able to notice those things in order to not make any design mistakes that can cause inconsistencies in the art or project. , and what you found difficult about it. I found this quiz to be difficult because when faced on the hard mode there are differences in the designs that are not obvious enough to notice right away. Differences such as text weight as well as spacing between words.
