The bachelors is the whole pink part not just the bump. It looks like more volume overall than the masters. It’s meant to represent the additional breadth.

But yeah masters programs do vary widely. When I was in undergrad there were students doing a CS masters coming from other disciplines. They mostly took classes with us and had to write maybe an extra paper to “make it a 6000 level class” (granted I did take more of the theory heavy CS classes than was required).

In that case their masters was basically equivalent to just the bump from the bachelors.