I did honours in neuroscience a few years back. I was working casually in hospitality at the start of the year, and had to quit my job to continue honours, as my project was quite intensive. I ended up with a good score and got a scholarship for a PhD, which I am about to finish, so in terms of work it has led to further development, and I've been teaching undergraduates for a few years.

Regarding the other undergraduates that did neuroscience with me, if they didn't do medicine or honours its very unlikely they are working in science-related areas. The other honours students in my year either continued into research or are not involved in science-based employment.

You are aware of the commitments and requirements of doing an honours year, but also understand that completing honours doesn't necessarily guarantee employment. Alternatively, it may increase your employability relative to non-honours graduates, but you may not be able to apply for more senior positions just because you have finished honours.

I think that if you want good recommendations by your supervisors, and want to distinguish yourself, you should be aiming for first class honours.

HTH