Majors Engineering Science

I doing my first bachelor in engineering science and have to choose a major next year. Just out of interest I was looking at what options were available. Because I joined after the 2023-2024 I'm in the new system where there is no major/minor system anymore but just a major you choose throughout the second bachelor. After digging a little deeper I found that choosing a major narrows your options of master courses down quiet a bit in comparison to the system they used until last year. So I was looking into some majors and definitely know now which ones I won't choose but was curious what the main differences were between some masters and the consequences it has after your studies (what kind of job.. etc). The reason I bring up the master programs even though I should focus first on finishing my bachelor is because I feel like I have to make the right choice regarding my major so that I am not forced to "preparation program" to attend the master I want. So my question is: What would be the main differences between the masters in Computer Science, Electrical Engineering and Mathematical Engineering in terms of the program itself and job/work opportunities after my studies?

TLDR: What's the difference between Computer Science, Electrical Engineering and Mathematical Engineering?

PS: I know I can look compare the ECTS-fiches and I already did but I want to get some more insight.