8 different font sizes, no logical line heights, some elements are spaced tightly (ordered list, share button) and some far apart (radio buttons). And the primary buttons in image 1 and 3 are teal, but in 2 we introduce a yellow button and in 3 there's a red one.

Even though this is about infographics, there is a lot of useful information here: https://blog.datawrapper.de/beautifulcolors/