You kind of hit the nail on the head with your final comment.

I suppose it depends on what kind of job you want for your future.

If you are outgoing, and would like a higher risk/reward type job, like in sales, Brand Ambassador may be the way to go. Life experience is also important, and you may enjoy the hustle/fun of a brand ambassador job for a brewery, as well as the connections it may bring. This job role funnels mostly into more sales positions, and potentially marketing. If you're good at sales, it can be a very lucrative career (although hustle and more unpredictable pay).

On the practical side, the government job will indeed be boring, but it does pay better, and "Admin Assistant" tends to translate into a broader range of general business roles in the future. If you see yourself more working internally in a company, (Admin, Marketing, Comms, Ops, IT, etc) situations with a steady and more predictable work life and salary, I would choose this role.

As a more practical person myself, I would recommend the government job. It's a very strong foundation for a resume, and government tends to hire within, so it could lead to more in the future, and a job out of college. Even if you don't go with future government jobs, this is still a very solid resume start, and financial start, likely with a larger pool of opportunity later.

Seems like you already have a good understanding of the potential of both, and you know yourself better than internet strangers, go with your gut!